Discover Hidden Tools
Browse curated websites, utilities, archives, and tools most people never find.
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Histography
Interactive timeline of all recorded history from the Big Bang to 2015, drawing from Wikipedia to visualize the density of events by time period and category.
Research & DataOpenSecrets
Nonpartisan database of US campaign finance data and lobbying records, tracking money in politics at the candidate and organization level.
Research & DataBellingcat
Independent investigative journalism collective pioneering open-source intelligence techniques for conflict verification and accountability reporting.
Productivity ToolsCapacities
Personal knowledge management app that stores notes as typed objects — books, people, projects — with relational links between them.
Hidden WebsitesFarnam Street
Shane Parrish's site on mental models, decision-making, and thinking clearly — drawing from business, psychology, philosophy, and history.
Hidden WebsitesAtlas Obscura
Collaborative guide to the world's most unusual and overlooked places — over 25,000 destinations curated by a global community of explorers.
Creative ToolsThe Noun Project
Library of over 5 million royalty-free icons and stock photos contributed by designers worldwide, covering even obscure concepts commercial sets miss.
ArchivesHathiTrust Digital Library
Collaborative digital library with 17 million digitized items from research libraries worldwide, including millions of public-domain books with full-text search.
Productivity ToolsCamelCamelCamel
A free Amazon price tracker that shows the full price history of any Amazon product and sends email alerts when an item drops to your target price — covering millions of products across multiple Amazon regions.
Learning Resources3Blue1Brown
Visual mathematics videos and interactive lessons that build genuine intuition for complex topics.
Forgotten Books
A digital library of rare and obscure historical books — scanned from original texts and covering history, philosophy, science, occult literature, and forgotten classics — with millions of titles accessible free.
AI ToolsElevenLabs
An AI voice synthesis platform producing highly natural-sounding speech in 29 languages — with voice cloning, emotional range, a dubbing tool for videos, and a library of pre-made voices for different styles.
Creative ToolsOpenverse
Search over 800 million openly-licensed images and audio files free to use.
Carbon
Create and share beautiful images of source code in seconds.
Warp Terminal
Modern AI-augmented terminal with collaborative features and intelligent command search.
Learn Anything
Topic discovery site that maps subjects to curated learning resources, helping users start from a broad interest and branch into structured study paths.
Arcade Space
A curated collection of browser-based indie games and classic arcade titles playable directly in the browser with no installation required.
AI Dungeon
Infinite AI-generated text adventure game where you can take the story in any direction.
Internet Archive
Non-profit digital library offering free access to millions of books, movies, music, software, and archived web pages.
Productivity ToolsWeTransfer
Send large files (up to 2GB free) via a simple link — no account required for the sender or recipient.
Hidden WebsitesNamechk
Checks username and domain availability across dozens of social networks and platforms simultaneously.
Hidden WebsitesJustDeleteMe
Directory of direct links and instructions for deleting your account on hundreds of websites and apps.
Research & DataDOAJ
Directory of Open Access Journals — a curated, community-vetted index of tens of thousands of peer-reviewed, freely accessible academic journals.
Learning ResourcesOpenStax
Free, peer-reviewed college textbooks covering math, science, business, and humanities — funded by Rice University and philanthropic grants.
Productivity ToolsPortfolioTab
Turns your browser's new-tab page into a live portfolio — showcase your work to yourself (and anyone who sees your screen) every time you open a tab.
AI ToolsThe AI Library
Curated directory of 5,000+ AI tools, organized by category, for discovering software across every corner of the AI landscape.
Research & DataUnpaywall
Free browser extension and database that finds legal, open-access versions of paywalled research papers.
Developer UtilitiesShlink
Open-source, self-hosted URL shortener with a full REST API — a free alternative to Bitly for link shortening and click tracking.
Productivity ToolsJoplin
Open-source note-taking and to-do app with end-to-end encryption — a free, cross-platform alternative to Evernote.
Developer UtilitiesKeycloak
Open-source identity and access management — single sign-on, social login, and user federation as a self-hostable alternative to Auth0.
Developer UtilitiesSigNoz
Open-source observability platform — metrics, traces, and logs in one dashboard as a self-hostable alternative to Datadog.
Research & DataMetabase
Open-source business intelligence and data visualization tool — connect a database and build dashboards without Tableau's licensing cost.
Developer UtilitiesAppsmith
Open-source low-code platform for building internal tools and admin panels — a self-hostable alternative to Retool.
Productivity ToolsTwenty
Open-source CRM with a modern, spreadsheet-like interface — a self-hostable alternative to Salesforce for managing contacts and deals.
Creative ToolsWebstudio
Open-source visual website builder that exports clean code — a self-hostable alternative to Webflow with no vendor lock-in.
Developer UtilitiesMedusa
Open-source, headless commerce framework — build a fully custom online store backend as a free, self-hostable alternative to Shopify.
Creative ToolsKdenlive
Free, open-source, non-linear video editor with multi-track editing, effects, and color grading — a full alternative to Premiere Pro.
Developer UtilitiesSupabase
Open-source Firebase alternative — Postgres database, authentication, storage, and realtime subscriptions bundled into one backend platform.
Productivity ToolsDocuSeal
Open-source document signing platform — build fillable PDF forms and collect legally binding e-signatures without DocuSign's per-envelope fees.
Productivity ToolsChatwoot
Open-source customer engagement platform — live chat, shared inbox, and helpdesk as a self-hostable alternative to Intercom.
Productivity ToolsPlanka
Open-source, realtime kanban board — a self-hostable alternative to Trello for visual task and project management.
Productivity ToolsPlane
Open-source project management platform — issue tracking, sprints, and roadmaps as a self-hostable alternative to Jira.
Productivity ToolsLanguageTool
Open-source grammar, style, and spell checker supporting 30+ languages — a free, self-hostable alternative to Grammarly.
Developer UtilitiesUmami
Simple, open-source, privacy-focused website analytics — a self-hosted, cookie-free alternative to Google Analytics.
Productivity ToolsFormbricks
Open-source survey and experience-management platform — build in-product surveys and forms without Typeform's per-response pricing.
Productivity ToolsNocoDB
Open-source no-code database platform that turns any SQL database into a smart spreadsheet — a self-hostable alternative to Airtable.
Productivity ToolsImmich
Self-hosted photo and video backup platform with mobile auto-upload — a privacy-focused, open-source alternative to Google Photos.
Productivity ToolsSyncthing
Open-source, peer-to-peer file synchronization — sync folders directly between your own devices with no cloud server or subscription.
Developer UtilitiesVaultwarden
Lightweight, unofficial self-hosted server compatible with Bitwarden clients — run your own password manager backend instead of paying for 1Password.
Productivity ToolsMattermost
Open-source, self-hostable team messaging platform — Slack-style channels, threads, and integrations under your own infrastructure control.
Productivity ToolsCap
Open-source, lightweight screen recorder for macOS and Windows — a fast, privacy-respecting alternative to Loom for quick video messages.
Developer Utilitiesn8n
Fair-code workflow automation platform — visually connect apps and APIs like Zapier, but self-hostable with no per-task pricing.
Productivity ToolsAppFlowy
Open-source, privacy-first workspace for notes, docs, and project management — a self-hostable alternative to Notion that keeps your data local.
Developer UtilitiesOpenSEO
Open-source, self-hosted alternative to Semrush and Ahrefs — keyword research, rank tracking, backlinks, and site audits you host yourself.
Productivity ToolsListmonk
Self-hosted, high-performance newsletter and mailing list manager — send bulk campaigns and manage subscribers without per-contact SaaS fees.
Creative ToolsPenpot
Open-source design and prototyping platform for UI/UX teams — built on open web standards, no proprietary file formats or vendor lock-in.
AI ToolsMurf AI
AI text-to-speech studio with 120+ studio-quality voices across 20 languages — create voiceovers for videos, presentations, and podcasts.
AI ToolsPhotoroom
AI photo editor for product photography — remove backgrounds, generate new ones, relight subjects, and batch-process hundreds of images at once.
AI ToolsClipdrop
Suite of AI image editing tools by Stability AI — background removal, object cleanup, relighting, upscaling, and more in a simple web interface.
AI ToolsFireworks AI
Production-grade inference API for open-source models — run Llama, Mixtral, Flux, and dozens more at some of the fastest speeds available.
AI ToolsWindsurf
AI-first code editor from Codeium with an autonomous coding agent — Cascade — that plans, writes, and executes multi-file changes on your behalf.
AI ToolsLovable
Build full-stack web applications from plain-English descriptions — Lovable generates React frontends with Supabase backends and deploys them instantly.
AI ToolsBolt
AI-powered full-stack web development in the browser — describe an app and get working code with a live preview, terminal, and file editor.
AI ToolsPika
AI video generation tool — create and edit videos from text prompts, images, or existing footage with cinematic control over style and motion.
AI ToolsEleutherAI
Nonprofit AI research collective that builds and openly releases frontier language models, evaluation frameworks, and interpretability research.
AI ToolsHedra
Generate AI videos of talking characters — upload a portrait photo and audio clip and Hedra animates realistic lip-sync and facial motion.
AI ToolsPlayground
Free AI image creation platform with a canvas editor — mix real photos with AI-generated elements, apply styles, and edit with natural language.
AI ToolsTopaz Labs
AI-powered photo and video enhancement tools — noise reduction, sharpening, upscaling, and motion interpolation used by professionals worldwide.
AI ToolsMagnific AI
AI image upscaler that adds realistic detail, texture, and sharpness while enlarging images 2x to 16x — not just interpolation.
AI ToolsLangflow
Visual drag-and-drop builder for creating AI pipelines — connect LLMs, vector stores, agents, and tools without writing LangChain boilerplate.
AI ToolsDify
Open-source LLM application platform for building, deploying, and monitoring AI workflows, agents, and chatbots — self-hostable or cloud-hosted.
AI ToolsFlowise
Open-source drag-and-drop builder for creating LLM applications — RAG pipelines, chatbots, agents, and API integrations with no coding required.
AI ToolsWeights & Biases
ML experiment tracking platform — log metrics, compare runs, visualize model performance, and collaborate on machine learning projects.
AI ToolsGrok
xAI's AI assistant with real-time web access, image generation, and document analysis — available free at grok.com.
AI ToolsDeepSeek
Free AI chatbot with strong reasoning and coding capabilities, built on DeepSeek's R1 and V3 models — competitive with leading frontier models.
AI ToolsCivitai
Community hub for discovering, downloading, and sharing AI image generation models, LoRAs, embeddings, and workflows for Stable Diffusion.
AI ToolsLeonardo.ai
AI image generation platform with a library of fine-tuned models optimized for game assets, concept art, product design, and creative illustration.
AI ToolsHeyGen
Create professional AI videos featuring realistic talking avatars — translate and lip-sync videos into 40+ languages without re-filming.
AI ToolsLuma Dream Machine
Generate high-quality, cinematic video clips from text prompts or reference images using Luma AI's Dream Machine model.
AI ToolsFal.ai
Run hundreds of open-source AI models instantly — image generation, video, audio, and more — via a fast inference API or interactive browser playground.
Weird & FunNightwave Plaza
Vaporwave and retrowave internet radio station streaming music 24/7 with animated aesthetic visuals — the definitive home of the genre online.
Weird & FunLofi Cafe
Curated collection of lo-fi music streams with multiple aesthetic themed stations — a distraction-free alternative to YouTube lo-fi channels.
Weird & FunEarth.fm
Curated library of nature soundscapes recorded in threatened ecosystems worldwide — each recording is geolocated and many come from areas under active conservation.
Weird & FunMyNoise
Scientifically designed sound masking and relaxation soundscapes with 200+ generators, each with custom equalizer controls per frequency band.
Weird & FunHackerTyper
Press any key to generate realistic-looking code on screen — the classic tool for pretending to be a movie hacker.
Weird & FunListen to Wikipedia
Real-time visualization and sonification of Wikipedia edits — every edit triggers a chime and a ripple, creating a meditative data art experience.
Weird & FunThe Scale of the Universe 2
Interactive visualization comparing the sizes of everything in the universe — from quantum foam to the observable universe — on a continuous scrollable scale.
Research & DataThe Markup
Nonprofit tech accountability journalism organization that investigates how algorithms affect people, publishing open-source tools and underlying data.
Research & DataGovTrack
Tracks all US federal legislation and congressional voting records, with bill passage predictions and email alerts for specific representatives.
Research & DataClimate Trace
Independent emissions tracking initiative using satellite data and machine learning to estimate greenhouse gas emissions from individual facilities worldwide.
Research & DataGlobal Forest Watch
Near-real-time deforestation monitoring platform using satellite data to track forest cover change across every country and protected area.
Research & DataProPublica
Nonprofit investigative journalism organization that publishes both articles and the underlying datasets used in every investigation.
Productivity Toolstldv
AI meeting recorder for Zoom and Google Meet that generates timestamped summaries and lets you search or clip specific moments from recordings.
Learning ResourcesPatterns.dev
Free book on modern JavaScript and React design patterns — rendering strategies, performance optimization, and component architecture with interactive examples.
Learning ResourcesFrontend Mentor
Real-world frontend challenges with professional Figma designs and no starter code — build the UI yourself and compare with community solutions.
Learning ResourcesTeach Yourself CS
Opinionated self-study guide to computer science — selects the single best resource for each of nine core CS subjects and explains why.
Learning ResourcesFull Stack Open
Free university-level full-stack web development course from the University of Helsinki covering React, Node, GraphQL, TypeScript, and CI/CD.
Hidden WebsitesTechmeme
Algorithmically-curated tech news aggregator that surfaces the top stories across hundreds of sources in a single scannable page.
Hidden WebsitesRibbonfarm
Venkatesh Rao's long-form blog exploring organizational behavior, technology, and culture through an idiosyncratic systems-thinking lens.
Hidden WebsitesFutility Closet
Daily collection of puzzles, curiosities, strange historical facts, and unsolved problems — running continuously since 2005 with no algorithmic filler.
Hidden WebsitesAstral Codex Ten
Scott Alexander's blog covering psychiatry, rationalism, AI, economics, and book reviews with characteristically careful reasoning and steel-manned opposing views.
Developer UtilitiesWappalyzer
Technology profiler that identifies the frameworks, CMS, analytics, and infrastructure used by any website — as a browser extension or web lookup.
Developer UtilitiesSmallDev.tools
Lightweight collection of developer utilities for formatting, encoding, diffing, and generating data — all client-side with no ads or cookie banners.
Developer UtilitiesSecurity Headers
Free HTTP security header scanner that grades websites and explains what each missing header protects against — actionable before deployment.
Developer UtilitiesGTmetrix
Website performance analysis tool that grades pages against Google Core Web Vitals and Lighthouse metrics with detailed waterfall request charts.
Developer UtilitiesRegExr
Interactive regex tester with real-time match highlighting, a community pattern library, and detailed explanation of each pattern element.
Creative ToolsHeroicons
Hand-crafted MIT-licensed SVG icons by the Tailwind CSS team, available in outline and solid variants — optimized for web interfaces.
Creative ToolsPhosphor Icons
Flexible open-source icon family with 1,200+ icons in six weights — thin, light, regular, bold, fill, and duotone — for React, Vue, and SVG.
Creative ToolsFontsource
Self-hosted npm packages for every Google Font, enabling privacy-respecting font delivery without external CDN requests.
Creative ToolsAdobe Color
Free color palette generator and harmony tool with extract-from-image functionality and an extensive community palette library.
Creative ToolsIcons8
Library of 1.5 million icons in consistent design styles, plus photos, illustrations, and AI image generation tools — all in one place.
ArchivesCalisphere
California's digital collections portal with 1.5 million items from UC libraries, the California Historical Society, and hundreds of local archives.
ArchivesThe Avalon Project
Yale Law School archive of primary legal and historical documents from ancient times to the present, fully searchable and free.
Hidden WebsitesPrivnote
Creates a one-time link containing a private note that permanently self-destructs after being read once — no account required. Optionally set a passphrase, expiry time, or receive an email notification when the note is read.
Hidden WebsitesVirusTotal
Upload any file or paste any URL and VirusTotal scans it simultaneously against over 70 antivirus engines and security vendors, returning a detailed report on whether anything flagged it as malicious.
Research & DataAlternativeTo
A crowdsourced directory that finds free and open-source alternatives to any software, app, or web service — covering desktop, mobile, and web platforms with community ratings and filtering by platform and licence.
Productivity ToolsJustWatch
A streaming search engine that tells you exactly which platform — Netflix, Prime Video, Hulu, Disney+, Apple TV+, and dozens more — is currently streaming any movie or TV show, and at what price if not included in a subscription.
Productivity ToolsTinyWow
A collection of over 100 free online tools covering PDF editing, image conversion, video processing, AI writing, file format conversion, and more — all browser-based with no account required.
Productivity ToolsTemp Mail
Generates a disposable, temporary email address instantly — no sign-up required. Incoming emails appear in real time in your browser, letting you verify accounts, receive links, and avoid spam without exposing your real address.
ArchivesProject Gutenberg
A volunteer-run digital library offering over 70,000 free eBooks — primarily classic literature and older works whose US copyright has expired — available to download or read online in multiple formats including EPUB, Kindle, and plain text.
Hidden WebsitesBored Button
Press a button to be sent to a random, curated, interesting website from across the internet.
Canva
Browser-based graphic design platform with thousands of templates for social media, presentations, and print.
Zoom Quilt
Infinitely zooming collaborative artwork that seamlessly loops through surreal painted scenes.
Calmly Writer
Minimalist distraction-free writing app that fades out everything except the paragraph you are currently writing.
Hugging Face Spaces
Gallery of thousands of live ML demos built by the community, runnable directly in the browser.
PDFAnnotations
Extract PDF highlights, comments & notes instantly. Export to Markdown, Notion, Obsidian, CSV. Processed locally in your browser.
AI Image Cleaner
Free online AI image cleaner: remove objects, people, text, and watermarks in your browser. No install, no credit card—brush a mask and download. Try free now!
Vocemo
On-device AI for Mac: type what you say, write up meetings, read text aloud, translate, and handle PDFs. Everything runs on your own Mac. Nothing is uploaded.
PixMind
Create stunning AI images and videos for free. Powered by Imagen 4, Veo 3, and PixVerse. Fast text-to-image and video generation. Use PixMind to create, edit…
Tunefind
Find the name of any song played in a TV show, movie, or trailer, searchable by episode and exact scene.
Productivity ToolsiLovePDF
Merge, split, compress, and convert PDF files for free with a full suite of easy browser-based PDF tools.
Weird & FunCoffitivity
Ambient cafe background noise designed to boost focus and creativity — the productivity benefits of working from a coffee shop, anywhere.
Developer UtilitiesJSON Formatter
Paste in messy JSON and instantly get it formatted, validated, and readable — a quick utility for developers debugging API responses.
AI ToolsSciSpace
An AI-powered tool that explains dense academic papers in plain language, letting you ask questions directly about any PDF.
Developer UtilitiesCode Beautify
Format, validate, and beautify JSON, XML, CSS, SQL, and dozens of other code and data formats instantly in your browser.
Research & DataSimilarsites
Discover websites similar to any site you already like — useful for finding alternatives or exploring a niche further.
Productivity ToolsDowndetector
Real-time outage and problem reports for thousands of websites and services, crowdsourced from user reports.
Creative ToolsSmartmockups
Drop a screenshot into realistic device and print mockups for free — no Photoshop needed to make a design look presentation-ready.
Productivity Tools10 Minute Mail
Get a free, temporary email address that self-destructs after 10 minutes — perfect for avoiding spam on one-off signups.
AI ToolsUnscreen
Automatically remove the background from any video for free, frame by frame, with no green screen required.
Learning ResourcesPDF Drive
A massive free search engine for PDF books and documents, covering everything from textbooks to novels.
Productivity ToolsFile.io
Share files with a link that automatically deletes itself after it is downloaded once, keeping shared files off the internet for good.
Productivity ToolsFast.com
Netflix's no-frills internet speed test — checks your download speed instantly with no ads or sign-up required.
Productivity ToolsSmallpdf
A clean, free toolkit for editing, compressing, converting, and e-signing PDF files directly in the browser.
ArchivesTrove
The National Library of Australia's aggregated search across newspapers, books, images, and archives from libraries and museums nationwide.
ArchivesFamilySearch
A free genealogy archive with billions of historical records — census data, birth and death records, immigration documents — searchable by name.
ArchivesBritish Library
The UK's national library, with extensive digitized collections spanning historical manuscripts, sound recordings, maps, and rare books.
ArchivesMet Museum Open Access
The Metropolitan Museum of Art's collection of 490,000+ artworks released under open access, free to download and use for any purpose.
ArchivesGetty Open Content
The Getty's collection of artworks made freely available under an open content program, with high-resolution downloads and no usage restrictions.
ArchivesGoogle Arts & Culture
Ultra-high-resolution digitized collections from thousands of museums worldwide, viewable in gigapixel detail down to individual brushstrokes.
ArchivesNational Library of Israel
Digital archive of historical Jewish and Israeli newspapers, manuscripts, and photographs spanning the 19th and 20th centuries.
ArchivesBritish Newspaper Archive
A vast searchable archive of digitized British and Irish newspapers spanning centuries, with free search and preview before a paid subscription.
ArchivesNewspaper Navigator
A Library of Congress machine-learning tool that searches the visual content — photos and illustrations — inside historical American newspapers.
ArchivesCalifornia Digital Newspaper Collection
A free, searchable archive of historical California newspapers from 1846 to the present, with over 52 million digitized articles.
Weird & FunPixel Thoughts
A minimalist site that gives you 60 seconds to type out whatever's on your mind before it dissolves into stars and disappears forever.
Weird & FunCleverbot
An early chatbot that learns from every conversation it's ever had, producing responses pulled from millions of past human exchanges.
Weird & FunNyan Cat
The original animated Pop-Tart cat flying through space on an endless rainbow trail, looping the same 3-second song forever.
Weird & FunSlow Roads
An endless, procedurally generated driving simulator through calm, scenic landscapes — no goals, no traffic, just driving.
Weird & FunAkinator
An AI genie that guesses any real or fictional character you're thinking of by asking a series of yes/no questions.
Weird & FunLittle Alchemy
A minimalist crafting game where you combine basic elements — earth, fire, water, air — to discover hundreds of new items.
Weird & FunOne Million Checkboxes
A shared grid of one million checkboxes that everyone visiting the site can check in real time, together.
Weird & FunPaper Toilet
An infinite roll of virtual toilet paper you can scroll through forever, with a running counter of how much you've unrolled.
Weird & FunIs It Christmas
Answers one question — is it Christmas today? — with a simple YES or NO, updated once a year.
Weird & FunEel Slap
Two hands slap each other with an eel, faster the more you click. That's the entire site.
Weird & FunWiki Roulette
Sends you to a completely random Wikipedia article with one click — a simple, endlessly rewarding rabbit hole.
Creative ToolsGIMP
Free, open-source raster image editor with layers, filters, and scripting support — the long-standing free alternative to Photoshop.
Creative ToolsKrita
Free, open-source digital painting software built specifically for illustrators and concept artists, with extensive brush customization.
Creative ToolsBlender
A completely free, open-source 3D creation suite — modeling, sculpting, animation, VFX, and rendering — used in professional film and game production.
Creative ToolsFreepik
A massive library of free and premium vectors, stock photos, icons, and templates, now with AI image generation built in.
Creative ToolsAdobe Firefly
Adobe's AI image and design generator, trained on licensed content and integrated directly into Photoshop, Illustrator, and Express.
Creative ToolsArcads
Generates UGC-style video ads using AI actors from a script — choose a persona, write the lines, and publish to TikTok or Meta.
Creative ToolsOpusClip
Takes a long video — podcast, webinar, stream VOD — and automatically cuts it into short clips formatted for TikTok, Reels, and Shorts.
Creative ToolsSynthesia
Generates AI avatar videos from a text script — no camera, actor, or studio required — in over 140 languages.
Creative ToolsComfyUI
A node-based visual interface for building custom Stable Diffusion image generation pipelines, with full control over every step of the process.
Creative ToolsRecraft
AI image generator that can output real, editable SVG vectors — not just raster images — exportable directly to Illustrator or Figma.
Creative ToolsMidjourney
One of the most widely used AI image generators, known for a distinctive, painterly aesthetic and strong prompt-to-image coherence.
Learning ResourcesAdvent of Code
An annual set of 25 daily programming puzzles released each December, solvable in any language, with a global leaderboard.
Learning ResourcesProject Euler
A long-running series of challenging mathematical and computational problems designed to be solved with a short, efficient program.
Learning ResourcesCS Unplugged
Teaches core computer science concepts — algorithms, binary, sorting — through physical activities and games, with no computer required.
Learning ResourcesReal Python
In-depth Python tutorials and articles that go well beyond beginner syntax into idiomatic patterns, internals, and real project walkthroughs.
Learning ResourcesCodecademy
Interactive coding courses across dozens of languages and frameworks, with an in-browser editor so you write real code inside every lesson.
Learning ResourcesDuolingo
The most widely used language-learning app, using short gamified lessons, streaks, and spaced repetition to build vocabulary and grammar over time.
Learning ResourcesCodewars
Practice programming through community-created challenges ("kata") ranked by difficulty, with the ability to see how other people solved the same problem.
Learning ResourcesLeetCode
The standard platform for practicing coding interview problems, with thousands of algorithm challenges and company-tagged question sets.
Learning ResourcesBoot.dev
A backend-development learning platform teaching Go, Python, and computer science fundamentals through browser-based coding challenges.
Learning ResourcesW3Schools
A long-running reference and tutorial site covering HTML, CSS, JavaScript, SQL, and most other web technologies with interactive "try it yourself" editors.
Learning ResourcesMDN Web Docs
Mozilla's reference documentation for HTML, CSS, and JavaScript — the resource professional web developers keep open in a tab at all times.
Hidden WebsitesUses This
Short interviews asking creative and technical people one simple question: what hardware and software do you use to get things done?
Hidden WebsitesThe Browser
A daily digest of five links hand-picked for quality writing — essays, journalism, and criticism curated rather than algorithmically ranked.
Hidden WebsitesLessWrong
A community blog focused on rationality, decision-making, and AI safety, with a large archive of long-form essays going back over a decade.
Hidden WebsitesMetaculus
A forecasting community where users predict the probability of future events — from elections to AI milestones — and track their own accuracy over time.
Hidden WebsitesSlashdot
One of the internet's oldest tech news and discussion sites, still running — "News for Nerds" since 1997, with a distinctive threaded comment system.
Hidden WebsitesSearXNG
A public instance of the open-source metasearch engine that aggregates results from dozens of search engines without tracking you.
Hidden WebsitesKagi
A paid, ad-free search engine that ranks results by quality instead of ad revenue, with tools to boost or block specific domains yourself.
Hidden WebsitesHacker Newsletter
A weekly curated digest of the best links from Hacker News, filtered down from the daily noise into a manageable Sunday read.
Hidden WebsitesFeedbin
A clean, fast RSS reader that also lets you subscribe to email newsletters and read them in the same feed as your other subscriptions.
Hidden WebsitesMarginal Revolution
Long-running economics blog by Tyler Cowen and Alex Tabarrok, covering everything from policy to culture through an economist's lens.
Hidden WebsitesDamn Interesting
Long-form, meticulously researched articles on obscure true stories — history, science, and disasters most people have never heard of.
Productivity ToolsFreedom
Cross-device app and website blocker that syncs block lists across desktop and mobile so you can't just switch devices to get around it.
Productivity ToolsSunsama
Daily planning tool that pulls tasks from your other tools each morning and has you deliberately plan a realistic day before you start.
Productivity ToolsCraft
A visually polished document and note-taking app with strong offline support and clean, presentation-ready formatting by default.
Productivity ToolsTana
Note-taking and knowledge tool built on a flexible node-based structure — every note can be tagged and turned into structured, queryable data.
Productivity ToolsTickTick
Task manager combining to-do lists, a built-in Pomodoro timer, habit tracking, and calendar view in one free app.
Productivity ToolsAkiflow
Universal task inbox that pulls items from email, Slack, and a dozen other tools into one place, then time-blocks them onto your calendar.
Productivity ToolsMotion
AI calendar and task planner that automatically schedules your to-do list into open calendar slots and re-plans your day when things change.
Productivity ToolsSuperhuman
A speed-focused email client built entirely around keyboard shortcuts, AI-assisted triage, and getting to inbox zero fast.
Productivity ToolsTodoist
Task manager built around speed — natural-language date parsing and a fast-add flow that keeps capturing a task to a couple of seconds.
Productivity ToolsRaycast
A fast, extensible launcher for Mac that replaces Spotlight — search files, run commands, and control apps entirely from the keyboard.
Productivity ToolsInstapaper
Read-it-later app with speed reading, Kindle integration, and the ability to export your entire saved collection as an EPUB file.
Research & DataCommon Crawl
Free, open repository of petabytes of web crawl data, updated monthly — the raw material behind many large language models.
Research & DataDBpedia
Extracts structured data from Wikipedia and publishes it as an open, queryable knowledge graph linking to other open datasets.
Research & DataWikidata
Free, structured knowledge base underlying Wikipedia's infoboxes — every fact is machine-readable and directly queryable.
Research & DataPhysioNet
Repository of physiological and clinical research data, including openly accessible ICU and health record datasets for exploration without credentialing.
Research & DataZindi
Africa-based data science competition platform, with datasets and challenges covering healthcare, agriculture, and finance across the continent.
Research & DataStanford Network Analysis Project
Collection of large network datasets — social graphs, communication patterns, web graphs, citation networks — for graph and network science research.
Research & DataUCI Machine Learning Repository
Long-running collection of datasets for machine learning research, spanning classification, regression, and clustering with detailed documentation.
Research & DataHarvard Dataverse
Open research data repository from Harvard's Institute for Quantitative Social Science, hosting 75,000+ citable datasets across every discipline.
Research & DataAcademic Torrents
Distributes large research datasets — from the Enron email corpus to machine learning benchmarks — via BitTorrent instead of a single slow server.
Research & DataAI2 Paperfinder
AI research search agent from the Allen Institute for AI, searching over 100 million abstracts with a transparent, step-by-step query process.
Research & DataResearchRabbit
Free citation-mapping tool that visualizes how academic papers connect — a strong free alternative to citation tools that institutions pay thousands for.
Developer UtilitiesHTTPie
A command-line HTTP client designed to be human-readable — colorized, formatted output and a much simpler syntax than raw curl.
Developer UtilitiesPostman
The most widely used API client — build, test, and document requests with collections, environments, and automated test scripts.
Developer UtilitiesMermaid Live Editor
Write flowcharts, sequence diagrams, and ER diagrams in plain text and see them render live — exportable as SVG or PNG.
Developer UtilitiesJWT.io
Decodes and verifies JSON Web Tokens in the browser, showing the header, payload, and signature verification status.
Developer UtilitiesRender
Cloud hosting platform with zero-config deploys for static sites and web services, plus a genuinely usable free tier.
Developer UtilitiesRailway
Deploy a database, backend, or full app straight from a GitHub repo with almost no configuration — Postgres, Redis, Node, Python, and more.
Developer UtilitiesDB Browser for SQLite
A simple, focused GUI for creating, browsing, and editing SQLite database files — the format used by Django, mobile apps, and embedded systems.
Developer UtilitiesDBeaver
Universal database GUI supporting PostgreSQL, MySQL, SQLite, MongoDB, Redis, and 80+ others with a SQL editor, ER diagrams, and data export.
Developer UtilitiesZellij
Terminal workspace and multiplexer with persistent, reusable layouts — split panes, tabs, and sessions that survive a disconnect.
Developer UtilitiesAtuin
Replaces your shell history with a searchable, encrypted, syncable database — search by directory, exit code, or full text across every machine.
Developer UtilitiesRequestly
Browser-level HTTP interception and mocking tool — redirect requests, modify headers, and mock API responses without setting up a proxy.
Developer UtilitiesHurl
Runs HTTP requests defined in plain-text files from the command line, with JUnit and HTML reports for chaining requests in CI pipelines.
AI ToolsGitHub Copilot
AI pair programmer built into most major editors, suggesting code completions, whole functions, and now agentic multi-file changes.
AI ToolsGenspark
AI search and agent platform that generates structured, sourced answers and can spin up mini-apps or slides on the fly.
AI ToolsManus
Autonomous AI agent that plans and executes multi-step tasks independently — research, data analysis, and file generation — with minimal supervision.
AI ToolsClaude
Anthropic's general-purpose AI assistant, with particular strength in long-document analysis, coding, and careful, nuanced writing.
AI ToolsReplit
Browser-based coding environment with an integrated AI agent that can scaffold, build, and deploy full applications from a natural-language prompt.
AI ToolsDeepL
Neural machine translation service widely regarded as more natural and accurate than Google Translate for supported language pairs.
AI ToolsTabnine
AI code completion tool with a strong focus on privacy — offers fully private, on-premises, and air-gapped deployment options for regulated teams.
AI ToolsGranola
AI meeting notes tool that listens in the background — no bot joining your call — and turns every meeting into clean, searchable notes.
AI ToolsClay
Data enrichment platform that pulls from 100+ sources and runs an AI research agent to find, verify, and personalize outreach data at scale.
AI ToolsGumloop
Drag-and-drop AI workflow automation — wires apps together with real AI nodes built into the canvas rather than bolted on afterward.
ArchivesThe Old Net
A proxy that fetches archived websites through period-accurate browser rendering, letting you browse the web as it looked in any year between 1990 and 2020 — with original fonts, colors, and broken image placeholders.
ArchivesInternet Arcade
The Internet Archive's collection of over 900 classic arcade games playable directly in the browser — including Pac-Man, Donkey Kong, Centipede, Space Invaders, and hundreds of more obscure titles.
ArchivesMusopen
A nonprofit that records and releases public domain classical music with no performance rights restrictions — providing free sheet music, recordings, and textbooks for composers, educators, and filmmakers.
ArchivesVersion Museum
A visual archive of how popular websites, software, and operating systems looked across every major version — screenshots of Google, Facebook, Windows, iOS, and hundreds of other products from launch to present.
Archivesarchive.ph
A webpage archiving service that creates permanent, searchable snapshots of any URL — including pages behind paywalls — stored independently of the original site, which may change or disappear.
Weird & FunMusic for Programming
A curated series of long-form music mixes — 60–90 minutes each — specifically selected for focused coding sessions, presented with a minimal terminal-aesthetic interface.
Weird & FunCookie Clicker
The original idle/incremental game — click a cookie to produce cookies, spend cookies on upgrades that produce more cookies automatically, expand to absurd cosmic scales. Created in 2013 and still actively updated.
Weird & FunBongo Cat
Press keys on your keyboard and a cat plays bongos in time — every key produces a different drum sound and the cat's paws animate to match. An interactive musical cat with no other purpose.
Weird & FunKoalas to the Max
Move your mouse over circles and they split into smaller circles — keep going and an image slowly reveals itself, built entirely from thousands of tiny dots.
Weird & FunCat Bounce
Cats. Bouncing around the screen. You can drag them or click to spawn more. There is no goal. The cats make sounds when they bounce off things.
Weird & FunFind The Invisible Cow
A browser game where you move your mouse around a blank screen and the volume of the 'COW' sound increases as you approach the invisible cow hidden somewhere on the page — a classic of minimalist design.
Weird & FunZombo.com
A legendary internet artifact from 1999 — a website that welcomes you to Zombo.com and informs you that anything is possible, in an infinite loop, forever. The only limit is yourself.
Creative ToolsFont Pair
A curated collection of Google Font pairings showing heading and body font combinations in realistic layouts — with filtering by style, mood, and font type, and direct links to use each pairing.
Creative ToolsCSS Gradient
A visual CSS gradient editor with an intuitive color stop interface for linear, radial, and conic gradients — with the full CSS output and a library of community-submitted gradients to browse and remix.
Creative ToolsCubic Bezier
An interactive cubic bezier curve editor for crafting custom CSS animation timing functions — drag the control points, compare against built-in easings, and copy the resulting CSS cubic-bezier() value.
Creative ToolsShape Divider
A tool for generating custom SVG section divider shapes — waves, tilts, arrows, curves, triangles, and more — with controls for height, direction, flip, and color, outputting ready-to-paste CSS and HTML.
Creative Toolsfffuel
A collection of free browser-based SVG and CSS generators for patterns, gradients, blobs, noise textures, confetti, and mesh gradients — each a standalone tool with copy-ready output.
Creative ToolsAnimista
An interactive CSS animation playground with a library of pre-built animations — entrance, exit, attention, text, and background effects — where you adjust parameters and copy the generated CSS.
Creative Toolsuiverse.io
A community library of open-source UI components — buttons, cards, loaders, toggles, checkboxes — all in pure CSS or Tailwind, with copy-paste code for each element and no JavaScript required.
Creative ToolsHaikei
A web app for generating layered SVG backgrounds, waves, blobs, gradients, and geometric patterns — with randomize and fine-tune controls and export to SVG or PNG.
Creative ToolsColor Hunt
A curated palette discovery platform with thousands of four-color palettes — browsable by trending, popular, recent, and seasonal themes — with one-click hex copy and palette download.
Creative ToolsFontshare
A free font delivery service from Indian Type Foundry offering high-quality, professionally designed fonts for commercial use — covering display, sans-serif, serif, and monospace styles.
AI ToolsNotDiamond
An AI model router that analyzes each query and automatically sends it to the best model for that specific task — routing between GPT-4o, Claude, Gemini, and others to optimize for quality or cost.
AI ToolsCodeium
A free AI code completion tool supporting 70+ languages and all major editors — providing inline suggestions, a chat interface for code questions, and codebase-aware context through its Windsurf IDE.
AI Toolsv0
Vercel's AI tool for generating React UI components and full pages from text descriptions or screenshots — producing clean, copy-pasteable Tailwind CSS code that works immediately in Next.js projects.
AI ToolsCursor
An AI code editor built on VS Code that integrates language models into the editing workflow — with inline generation, multi-file editing from natural language instructions, and a codebase-aware chat interface.
AI ToolsDescript
A video and podcast editor that transcribes your recording and lets you edit the audio and video by editing the transcript — delete a word in the text and the corresponding audio is removed from the timeline.
AI ToolsRunway
An AI video creation and editing platform with tools for text-to-video generation, video inpainting, background removal, motion tracking, and frame interpolation — used in professional film and commercial production.
AI ToolsLiveBench
An LLM benchmark that continuously updates with new questions sourced from recent news, research, and competitions — designed so models cannot be trained on the answers and results cannot be gamed.
Learning ResourcesPGExercises
A free PostgreSQL practice site with 80+ exercises covering joins, aggregation, subqueries, window functions, recursive queries, and date operations — running against a realistic club membership dataset.
Learning ResourcesCodeCrafters
A platform where you rebuild production software from scratch — your own Redis, Git, Docker, SQLite, or HTTP server — guided by test suites that verify your implementation competes with the real thing.
Learning ResourcesCrafting Interpreters
Robert Nystrom's free book walking you through building two complete interpreters from scratch — a tree-walk interpreter in Java, then a bytecode VM in C — for a full programming language called Lox.
Learning ResourcesThe Linux Command Line
William Shotts' free comprehensive book on the Linux command line — covering navigation, file operations, permissions, shell scripting, processes, and system administration — available to read online in full.
Learning ResourcesSQLZoo
A free interactive SQL tutorial with real database exercises covering SELECT, JOIN, aggregation, subqueries, and window functions — runnable directly in the browser against live datasets.
Learning ResourcesRefactoring Guru
A beautifully illustrated guide to design patterns and refactoring techniques — covering all 23 Gang of Four patterns and dozens of refactoring recipes with before/after code examples in multiple languages.
Learning Resourcesweb.dev
Google's free web development resource with courses, guides, and case studies on performance, accessibility, security, PWAs, and modern browser APIs — written by the Chrome team engineers.
Learning ResourcesJavaScript.info
A comprehensive and modern JavaScript tutorial covering the language from fundamentals to advanced topics — prototypes, async/await, closures, generators, and the DOM — with interactive exercises throughout.
Learning ResourcesCSS Grid Garden
A free browser game that teaches CSS Grid layout by having you write real grid properties to water garden plots — covering grid-column, grid-row, grid-area, and grid-template across 28 levels.
Learning ResourcesFlexbox Froggy
A free browser game that teaches CSS Flexbox by having you write real CSS properties to position frogs onto lily pads — covering all 24 flexbox properties across progressively harder levels.
Learning ResourcesRegexLearn
An interactive regex learning platform with visual pattern matching, immediate feedback as you type, and a structured curriculum from basic character classes to advanced lookaheads and backreferences.
Learning ResourcesLearn X in Y Minutes
A community-written cheat sheet site covering 170+ programming languages and tools in a dense, example-heavy format — showing syntax and idioms from variable declaration to classes in a single scrollable page.
Hidden Websiteseieio.games
A collection of experimental browser games by Amos Wenger — including a multiplayer game controlled entirely through a shared Google Spreadsheet, a single-pixel multiplayer game, and other absurdist browser-native experiences.
Hidden WebsitesHow Normal Am I
An interactive essay that uses your webcam and on-device ML to analyze your face — estimating your age, attractiveness, BMI, and emotional state to reveal how these algorithms work and what assumptions they encode.
Hidden WebsitesSDF Public Access UNIX
A free shared UNIX system running since 1987 that gives anyone a shell account, email address, web hosting, and access to a community of thousands of technically curious users worldwide.
Hidden WebsitesType Here
A distraction-free online typewriter with mechanical key sounds, an aged paper aesthetic, and no save button — everything you type exists only in the moment and disappears when you close the tab.
Hidden WebsitesWander
A virtual travel experience that drops you into curated Google Street View locations worldwide, with guided regional tours and an exploration mode for wandering with no destination in mind.
Hidden WebsitesWebamp
A pixel-accurate web recreation of Winamp 2.9 that plays MP3s from your local files or URLs — including the equalizer, playlist editor, visualizations, and support for thousands of original Winamp skins.
Hidden Websitesxkcd
Randall Munroe's webcomic covering science, mathematics, programming, linguistics, and culture — with 2,900+ strips ranging from genuinely instructive to profoundly absurd, updated three times a week.
Hidden WebsitesNicky Case
Nicky Case's portfolio of explorable essays — interactive simulations and games that teach game theory, network effects, cognitive bias, and mental health through systems you can play with and break.
Research & DataDB-Engines Ranking
A monthly ranking of 400+ database management systems by popularity — based on job postings, Stack Overflow activity, Google search trends, and technical discussion frequency — with multi-year trend charts.
Research & DataHumanitarian Data Exchange
OCHA's open platform hosting thousands of datasets on crises, displacement, food security, and health emergencies from UN agencies, NGOs, and governments — all freely downloadable.
Research & DataWTF Visualizations
A crowdsourced gallery of confusing, misleading, and badly designed data visualizations — truncated axes, 3D pie charts, dual scales, and charts that actively contradict their own headlines.
Research & DataSSRN
The Social Science Research Network — a preprint repository for economics, finance, law, political science, and management where authors post working papers before and after formal peer review.
Research & DataAWS Open Data Registry
Amazon's registry of publicly available datasets hosted on AWS — covering genomics, geospatial imagery, climate data, and economic indicators — searchable by domain, region, and data type.
Research & DataNASA Climate
NASA's climate change portal with real-time data visualizations, interactive charts, and downloadable datasets covering global temperature, sea level, CO₂ concentration, ice coverage, and ocean heat from NASA satellites.
Research & DataMacrotrends
A financial and economic data visualization site with 50+ years of historical charts for stock prices, P/E ratios, economic indicators, commodity prices, and interest rates — all freely accessible.
Research & DataLens
A free and open scholarly and patent search engine covering 227 million patent records and 209 million scholarly works — with full-text search, citation analysis, and export to reference managers.
Research & DataScite
An academic research tool that classifies how papers cite each other — distinguishing supporting, contrasting, and mentioning citations — so you can see whether a paper's claims have been confirmed or challenged.
Research & DataInciteful
An academic literature mapping tool that builds a citation network graph from a seed paper and uses network analysis to surface the most important connected papers you might otherwise never find.
Productivity ToolsClaap
An async video messaging tool that records screen with face cam, supports threaded comments at specific timestamps, and integrates with Slack and Notion — designed to replace synchronous status meetings.
Productivity ToolsSlab
A knowledge base and wiki platform built for internal documentation, with a clean editor, smart full-text search, topic organization, and verified content markers — with integrations for Slack and GitHub.
Productivity ToolsTimeCamp
A time tracking tool with automatic activity detection that logs which app or website you're using without requiring you to start a timer — with project categorization, billable hours, and client invoicing.
Productivity ToolsHemingway Editor
A writing editor that highlights hard-to-read sentences, excessive adverbs, passive voice, and unnecessary complexity — giving each piece a readability grade and pushing you toward clearer, shorter prose.
Productivity ToolsGrain
An AI meeting recorder that transcribes video calls, generates AI summaries, lets you clip shareable highlight moments, and syncs key points to your CRM — with support for Zoom, Meet, and Teams.
Productivity ToolsJitsi Meet
A free open-source video conferencing platform with no account required, no time limits, no downloads necessary, and end-to-end encryption — create a room instantly by visiting any jitsi URL.
Productivity ToolsLinear
A keyboard-driven project management tool for software teams with a clean data model (issues, cycles, projects, roadmaps) and deep GitHub and GitLab integration — built with performance as a core product value.
Productivity ToolsReflect
A networked note-taking app with AI writing assistance, automatic backlinks, and a daily notes structure — designed around how your mind works rather than forcing a folder hierarchy.
Productivity ToolsObsidian
A local-first Markdown note-taking app that stores notes as plain text on your device — with bidirectional wiki links, a graph visualization of note connections, and 1,500+ community plugins.
Developer UtilitiesDeno
A modern JavaScript and TypeScript runtime with built-in security, native TypeScript support, a standard library, and first-class support for web platform APIs — with a formatter, linter, and test runner included.
Developer UtilitiesLocalStack
A local cloud emulator that runs AWS services — S3, Lambda, DynamoDB, SQS, API Gateway, and dozens more — inside Docker, enabling fully local development and testing without AWS credentials or costs.
Developer Utilitiesk6
An open-source load testing tool that uses JavaScript scripts to define virtual user scenarios, with output compatible with Prometheus and Grafana and support for HTTP, WebSockets, and gRPC.
Developer UtilitiesPlaywright
Microsoft's end-to-end testing framework that controls Chromium, Firefox, and WebKit with a single API — with auto-waiting, network interception, parallel test execution, and a visual trace debugger.
Developer UtilitiesBun
A fast all-in-one JavaScript runtime, package manager, bundler, and test runner — designed as a drop-in replacement for Node.js with dramatically faster startup times and install speeds.
Developer UtilitiesTauri
A framework for building lightweight desktop applications using web technologies with a Rust backend — producing native binaries a fraction the size of Electron apps by using the OS WebView instead of bundling Chromium.
Developer UtilitiesZod
A TypeScript-first schema declaration and validation library that infers static types from runtime schemas — eliminating the need to maintain both a TypeScript type and a separate runtime validator.
Developer UtilitiesNeon
A serverless PostgreSQL platform that separates storage from compute — enabling instant database branching, autoscaling to zero when idle, and per-second billing with full Postgres compatibility.
Developer UtilitiesTurso
A SQLite-based database platform for edge and serverless deployments — consistent SQLite semantics with replication, branching, and a global edge network accessible via HTTP from any environment.
Developer Utilitieshtmx
A small JavaScript library that extends HTML with attributes for making AJAX requests, WebSocket connections, and CSS transitions directly in markup — enabling dynamic interfaces without writing JavaScript.
Developer Utilitiesmitmproxy
An open-source interactive HTTPS proxy for intercepting, inspecting, modifying, and replaying HTTP and HTTPS traffic from any application — desktop, mobile, CLI, or IoT device.
Developer Utilitiesngrok
A reverse proxy that creates a secure tunnel from a public HTTPS URL to your localhost, exposing local servers for webhooks, OAuth callbacks, mobile app testing, and sharing demos with clients.
Developer UtilitiesSmee
A webhook payload delivery service that exposes a public URL and forwards incoming webhook events to your localhost development server in real time — no account, no setup, no configuration.
Hidden WebsitesMLC LLM
A universal LLM deployment engine that compiles models to run natively on laptops, phones, and browsers — the same model, the same weights, running on NVIDIA, AMD, Apple Silicon, or WebGPU.
Productivity ToolsE2B
A cloud sandbox service for running AI-generated code safely, with $100 free credit, 150ms cold starts, and support for 20 concurrent sandboxes — designed for AI coding agents and assistants.
Productivity ToolsKaggle Notebooks
Free cloud notebooks with 30 hours per week of GPU access (dual T4), internet connectivity during training, and direct access to thousands of public datasets — all without any payment setup.
Productivity ToolsGoogle Colab
A free cloud notebook environment from Google with GPU access (T4, occasionally A100), pre-installed ML libraries, and seamless Google Drive integration for running Python code without local setup.
Research & DataOpen LLM Leaderboard
Hugging Face's primary benchmark leaderboard for open-weight language models, evaluating hundreds of models across standardized reasoning, knowledge, and coding benchmarks.
Developer UtilitiesLLaMA-Factory
A unified fine-tuning framework supporting 100+ language models with a web UI and CLI, covering SFT, RLHF, DPO, and other training methods with efficient LoRA and QLoRA support.
Developer UtilitiesUnsloth
A fine-tuning library that makes QLoRA and LoRA training 2x faster and use 50% less memory than standard implementations, enabling fine-tuning of large models on consumer GPUs.
Developer UtilitiesPydanticAI
An agent framework built by the Pydantic team that brings type safety and structured validation to LLM applications, ensuring model outputs conform to defined schemas at runtime.
Developer UtilitiesSmolagents
Hugging Face's minimalist agent library where agents write and execute Python code as their primary reasoning tool, rather than calling predefined function schemas.
Developer UtilitiesCrewAI
An open-source multi-agent framework for orchestrating teams of specialized AI agents that collaborate on complex tasks, with role assignment, task delegation, and sequential or parallel execution.
Developer UtilitiesLangGraph
A low-level framework from LangChain for building stateful, multi-agent AI applications as explicit graphs, with controllable execution flow, human-in-the-loop support, and built-in persistence.
Developer UtilitiesLangFuse
An open-source LLM engineering platform for tracing, evaluating, and monitoring AI applications in production, with prompt versioning, A/B testing, and user feedback collection.
Developer UtilitiesRAGFlow
An open-source RAG engine with deep document understanding — extracts structured content from PDFs, presentations, spreadsheets, and images using OCR and layout analysis before chunking.
Developer Utilitiespgvector
A PostgreSQL extension that adds vector similarity search to your existing database, letting you store embeddings and run nearest-neighbor queries alongside regular SQL queries.
Developer UtilitiesQdrant
A high-performance open-source vector search engine written in Rust, designed for production AI applications with support for filtering, payload storage, and sparse-dense hybrid search.
Developer UtilitiesChroma
An open-source vector database that runs in-process with no server required, designed specifically for AI applications that need to store and retrieve embeddings alongside metadata.
Hidden WebsitesWebLLM
In-browser LLM inference powered by WebGPU — runs full language models entirely inside Chrome or Edge with no server, no API key, and no data leaving your device.
Productivity ToolsGemini CLI
Google's open-source terminal AI agent powered by Gemini, with 1,000 free requests per day and a 1M token context window — capable of reading files, running code, and browsing the web.
Productivity ToolsFabric
An open-source AI augmentation framework by Daniel Miessler providing a library of curated prompt patterns for common tasks like summarizing, extracting insights, and writing — all runnable from the command line.
Productivity ToolsAnythingLLM
An all-in-one desktop and self-hosted web app for chatting with your documents using any LLM, with a built-in RAG pipeline, multi-user workspaces, and support for local or cloud models.
Research & DataLMSYS Chatbot Arena
A live human preference leaderboard where anonymous models compete head-to-head in blind evaluations, producing the most credible ranking of conversational AI quality available.
Research & DataArtificial Analysis
Independent benchmarks comparing AI model quality, inference speed, and pricing across providers — updated continuously with real measurements rather than self-reported figures.
Research & DataHugging Face
The central repository for open-source AI models, datasets, and Spaces demos — hosting over 1 million models and 150,000 datasets with free download and one-line API access.
Learning ResourcesHugging Face NLP Course
A free, comprehensive course on natural language processing with transformers, covering the full Hugging Face ecosystem from tokenization through fine-tuning and deployment.
Learning ResourcesAndrej Karpathy's Neural Networks: Zero to Hero
A free video lecture series by Andrej Karpathy building neural networks from scratch in pure Python, from backpropagation fundamentals through GPT-level language models.
Developer UtilitiesvLLM
A high-throughput production inference engine for large language models using PagedAttention memory management, capable of serving dozens of concurrent users from a single GPU.
Developer UtilitiesDSPy
A Stanford-developed framework for algorithmically optimizing LLM prompts and pipelines, replacing hand-written prompts with compiled programs that automatically improve based on defined metrics.
Developer UtilitiesOpenHands
An open-source autonomous AI software engineering agent that can write code, run terminal commands, browse the web, and interact with your codebase to complete multi-step programming tasks.
Developer UtilitiesPromptfoo
An open-source tool for testing, evaluating, and comparing LLM prompts and models through automated test suites, red-teaming, and side-by-side output comparison.
Developer Utilitiesllama.cpp
A high-performance C++ inference engine for running large language models on CPU and GPU with minimal dependencies, supporting quantized GGUF models for consumer hardware.
Developer UtilitiesContinue
An open-source AI code assistant extension for VS Code and JetBrains that connects to any LLM — including local models through Ollama — for autocomplete, inline edits, and chat.
Developer UtilitiesAider
An AI pair programming tool that runs in the terminal, edits your local files directly, and commits changes to git — supporting every major LLM provider including local models.
AI ToolsGitHub Models
Free access to a curated collection of AI models from providers including OpenAI, Meta, Mistral, and Microsoft, available directly within GitHub for prototyping and testing.
AI ToolsOpen WebUI
A self-hosted, ChatGPT-style web interface for running local models through Ollama or any OpenAI-compatible API, with support for RAG, multi-user access, and conversation history.
AI ToolsCerebras Inference
Free AI inference API offering up to 1 million tokens per day with no credit card required, powered by Cerebras wafer-scale silicon for extremely fast generation speeds.
AI ToolsGoogle AI Studio
Google's free browser-based development environment for building with Gemini models, including a free API tier with some of the highest token limits available to individual developers.
Weird & FunBeepBox
An in-browser chiptune music sequencer for composing retro 8-bit style music, with no account required and compositions shareable via URL.
Weird & FunIncredibox
A browser-based music creation game where you layer beatboxers and vocalists by dragging sounds onto animated characters to compose original tracks.
Weird & FunNull School Earth
A mesmerizing real-time visualization of global wind, weather, ocean currents, and atmospheric conditions as animated flows on a rotating globe.
Weird & FunStellarium Web
A free, browser-based planetarium that shows an accurate star map for any location on Earth at any time — past, present, or future.
Weird & FunChrome Music Lab
A collection of browser-based experiments from Google that make music creation and sound visualization accessible through interactive visual tools.
Developer UtilitiesBruno
An open-source API client that stores collections as plain-text files in your repository, designed as a privacy-focused alternative to Postman.
Developer UtilitiesCoolify
An open-source, self-hostable platform-as-a-service for deploying applications, databases, and services on your own servers with a Heroku-like experience.
Developer UtilitiesMXToolbox
A suite of free network diagnostic tools focused on email infrastructure — MX record lookup, SPF/DKIM/DMARC testing, blacklist checking, and SMTP diagnostics.
Developer UtilitiesURLScan.io
A free service that scans URLs and renders them in an isolated browser, capturing all network requests, DOM structure, and screenshots for security analysis.
Developer UtilitiesWebPageTest
A free web performance testing tool that runs your site from real browsers in real locations, producing detailed waterfall charts, Core Web Vitals, and optimization recommendations.
Developer UtilitiesIT Tools
A collection of handy browser-based utilities for developers and IT professionals — encoding, formatting, generation, conversion, and network tools in one place.
Developer UtilitiesCan I Use
A compatibility table showing browser support for HTML, CSS, JavaScript, and SVG features across all major browsers and versions.
Developer UtilitiesStackBlitz
A browser-based IDE that runs Node.js projects entirely in the browser using WebContainers, with npm install, hot reload, and shareable URLs.
Developer UtilitiesCodePen
An online code editor and social platform for front-end developers to build, share, and discover HTML, CSS, and JavaScript snippets in an instant live-preview environment.
Creative ToolsFramer
A browser-based web design tool that publishes directly to the web, with a design interface similar to Figma and no-code CMS capabilities.
Creative ToolsMixkit
A free library of high-quality stock video clips, music tracks, sound effects, and video templates, all available for commercial use without attribution.
Creative ToolsArtbreeder
A collaborative AI tool for creating and evolving images by blending and modifying existing artworks through intuitive sliders and genetic-style mixing.
Creative ToolsIdeogram
An AI image generation tool that excels at accurately rendering legible text within images — a capability most other image generators struggle with significantly.
Creative ToolsKapwing
A browser-based video editor for creating, editing, trimming, and adding subtitles to videos without installing software.
Creative ToolsPixabay
A community-driven library of over 4 million free images, videos, audio tracks, and vector illustrations licensed for use without attribution.
Creative ToolsPexels
A free stock photo and video library with over 3 million high-quality assets, all licensed for commercial use with no attribution required.
Creative ToolsSketchfab
A platform for publishing, sharing, and discovering 3D models — viewable in-browser without plugins and downloadable under various licenses.
Creative ToolsFont Squirrel
A curated collection of free, commercially licensed fonts with a web font generator for converting fonts to all required web formats.
Creative ToolsGoogle Fonts
A free library of over 1,500 open-source font families from Google, browsable and downloadable for use in any project with no licensing fees.
Learning ResourcesNature of Code
Daniel Shiffman's free online book and companion videos teaching creative coding through simulations of natural systems — physics, agents, neural networks, and evolution.
Learning ResourcesWikiversity
A Wikimedia project hosting free learning resources, courses, and research projects across all academic disciplines, editable by anyone.
Learning ResourcesAnki
A free, open-source flashcard program using spaced-repetition algorithms to optimize memory retention for anything you want to learn long-term.
Learning ResourcesOpen Culture
A curated aggregator of free cultural and educational media — online courses, audiobooks, ebooks, movies, and language lessons from major universities and cultural institutions.
Learning ResourcesStanford Encyclopedia of Philosophy
A comprehensive, peer-reviewed online encyclopedia of philosophy maintained by Stanford University — free, authoritative, and continuously updated.
Learning ResourcesExercism
A free platform for improving coding skills through practice exercises in over 70 programming languages, with optional human mentorship from volunteers.
Learning ResourcesThe Feynman Lectures on Physics
The complete text of Richard Feynman's iconic undergraduate physics lectures, freely available online in a beautifully typeset HTML format.
Learning Resourcesfast.ai
A practical deep learning course designed for people with coding experience who want to build and understand neural networks without requiring a math PhD first.
Learning ResourcesfreeCodeCamp
A free, self-paced coding curriculum covering web development, data science, and machine learning — with certifications and a large community forum.
Learning ResourcesCS50
Harvard University's introduction to computer science and programming, free online with full lecture videos, problem sets, and an active community.
Hidden WebsitesGwern.net
Gwern Branwen's personal research website containing long-form essays, statistical analyses, and experiments on psychology, AI, pharmacology, and prediction.
Hidden WebsitesNumbeo
The world's largest crowd-sourced database of city and country data covering cost of living, quality of life, crime, healthcare, and traffic indices.
Hidden WebsitesMarineTraffic
Real-time ship tracking service showing the position and details of vessels worldwide using AIS transponder data, with port activity and voyage history.
Hidden WebsitesFlightradar24
Real-time global flight tracking showing the position, altitude, speed, and route of aircraft worldwide using ADS-B transponder data.
Hidden WebsitesNautilus
A science and culture magazine organized around themes, publishing interconnected articles across biology, physics, psychology, and philosophy each issue.
Hidden WebsitesAeon
A digital magazine of ideas publishing essays and long-form articles in philosophy, science, society, and the arts from academics and public intellectuals.
Hidden WebsitesLow-tech Magazine
A publication questioning the belief in technological progress, exploring historical low-tech solutions and their modern applications — the website itself runs on solar power.
Hidden WebsitesWait But Why
Tim Urban's long-form illustrated blog tackling big questions in science, society, and human nature with deep research, hand-drawn diagrams, and irreverent humor.
Hidden WebsitesThe Marginalian
Maria Popova's long-running blog of essays exploring ideas at the intersection of science, art, philosophy, and literature, drawing on a vast reading life.
Hidden WebsitesQuanta Magazine
An editorially independent online publication covering developments in mathematics, physics, biology, and computer science for a general but intellectually serious audience.
AI ToolsJan.ai
An open-source desktop application for running AI models locally, with a ChatGPT-style interface and support for connecting to remote APIs.
AI ToolsCharacter.AI
A platform for creating and chatting with AI personas, including user-created characters and well-known fictional or historical figures.
AI ToolsYou.com
An AI search and productivity platform combining web search, AI chat, coding assistance, and image generation in a single interface.
AI ToolsOllama
A command-line tool for running large language models locally on Mac, Linux, and Windows with a simple pull-and-run workflow.
AI ToolsLM Studio
A desktop application for discovering, downloading, and running large language models entirely on your local machine with no internet connection required.
AI ToolsTogether AI
A cloud platform for running, fine-tuning, and deploying open-source AI models, with fast inference and competitive pricing.
AI ToolsReplicate
A platform for running and deploying machine learning models in the cloud via API, with a large library of community-contributed models.
AI ToolsGroq
An AI inference platform built on custom LPU hardware, offering dramatically faster token generation speeds than GPU-based alternatives — free API access available.
AI ToolsPerplexity AI
An AI-powered answer engine that searches the web in real time and returns sourced, cited responses rather than a list of links.
AI ToolsNotebookLM
Google's AI-powered research assistant that lets you upload documents, PDFs, and URLs and then ask questions, generate summaries, and create study guides from your sources.
Research & DataEurostat
The statistical office of the European Union, providing free access to harmonized statistics across all EU member states.
Research & DataAtlas of Economic Complexity
A Harvard research tool for visualizing global trade, economic complexity, and growth predictions across 250 countries and 5,000 products.
Research & DataFlourish
A browser-based data visualization and storytelling tool with animated charts, interactive maps, and embeddable graphics for non-programmers.
Research & DataData.gov
The official open data portal of the US federal government, providing access to hundreds of thousands of datasets from government agencies.
Research & DataProPublica Data Store
A collection of datasets compiled by ProPublica journalists for investigative reporting, many available for free download.
Research & DataRAWGraphs
An open-source web app for creating custom data visualizations from spreadsheet data using chart types not available in standard tools.
Research & DataDatawrapper
A free online tool for creating publication-quality charts, maps, and tables from your data — no coding required.
Research & DataWolfram Alpha
A computational knowledge engine that answers factual and mathematical queries by computing answers from curated data rather than searching the web.
Research & DataPhilPapers
A comprehensive index of philosophy research with curated bibliographies, discussion forums, and categorized access to papers across all philosophical disciplines.
Research & DataCORE
An aggregator of millions of open-access research outputs from repositories and journals worldwide, with full-text search and API access.
Research & DataGoogle Dataset Search
A search engine specifically for finding datasets hosted across the web, using structured metadata to surface publicly available research data.
Research & DataOpenAlex
A fully open catalog of the world's research output — over 250 million works with citations, author information, and institutional affiliations, free to query.
Research & DataWorld Bank Open Data
Free access to global development data covering hundreds of indicators across economics, health, education, and environment for every country over decades.
Research & DataPubMed
The National Library of Medicine's free database of over 35 million citations for biomedical literature, with full-text links where available.
Research & DataarXiv
An open-access preprint server for research papers in physics, mathematics, computer science, economics, and related fields — free to read and submit.
Productivity ToolsLoom
A screen and camera recording tool that creates shareable video links instantly, designed for async communication in remote teams.
Productivity ToolsAnytype
A local-first, open-source personal knowledge and productivity app with pages, databases, graphs, and full offline support — your data stays on your device.
Productivity ToolsWhimsical
A visual workspace for wireframes, flowcharts, mind maps, and sticky notes with a fast, minimal interface designed for thinking out loud.
Productivity ToolsTaskade
An AI-powered collaborative workspace combining tasks, notes, mind maps, and video calls in a single interface.
Productivity ToolsReadwise Reader
A unified reading app that brings together articles, newsletters, PDFs, ebooks, and Twitter threads with highlighting, annotations, and spaced-repetition review.
Productivity ToolsOmnivore
A free, open-source read-later app with highlighting, notes, newsletter ingestion, and a full-text search across everything you have saved.
Productivity ToolsCal.com
An open-source scheduling platform that lets you create bookable calendar links, manage availability, and automate meeting workflows.
Productivity ToolsCoda
A document editor that combines the flexibility of docs with database tables, automations, and interactive elements, replacing multiple tools in one place.
Productivity ToolsGamma
An AI-powered presentation and document tool that generates polished slides and pages from a text prompt or outline in seconds.
Productivity ToolsOtter.ai
AI-powered transcription service that converts speech to text in real time, with speaker identification, searchable transcripts, and meeting summaries.
Productivity ToolsClockify
A completely free time tracking software for teams, with unlimited users, projects, and reports — no credit card required.
Productivity ToolsToggl Track
One-click time tracking with automatic reporting, project categorization, and integrations with popular project management and invoicing tools.
Productivity ToolsNotesnook
A fully end-to-end encrypted, open-source note-taking app with rich text editing, offline support, and cross-platform sync.
Productivity ToolsStandard Notes
An end-to-end encrypted note-taking app with a free tier, cross-platform sync, and a focus on longevity and data portability.
Productivity ToolsLogseq
An open-source, local-first knowledge management tool that uses an outliner format with bidirectional linking to connect notes, journals, and tasks.
ArchivesSacred Texts Archive
The largest freely available collection of texts relating to religion, mythology, folklore, and the occult, spanning dozens of traditions in multiple languages.
ArchivesLibrary of Congress Digital Collections
Browse and search the Library of Congress's digitized collections, spanning maps, photographs, manuscripts, films, sound recordings, and printed works.
ArchivesFlickr Commons
A collaborative project where public institutions share photographs from their collections on Flickr, making millions of historical images freely accessible.
ArchivesFree Music Archive
A curated library of high-quality, legal audio downloads and streams from independent artists, organized by genre and licensing type.
ArchivesBritish Pathé
A digitized archive of over 100,000 historical newsreel films from 1896 to 1976, freely viewable online and covering major world events.
ArchivesOld Maps Online
A search engine for historical maps aggregated from major collections worldwide, allowing geographic and time-period filtering across hundreds of thousands of maps.
ArchivesNational Archives
The official repository of US federal government records, providing public access to historical documents, photographs, military records, and legislative materials.
ArchivesPerseus Digital Library
A foundational digital humanities project from Tufts University providing free access to classical Greek and Latin texts with integrated dictionaries and morphological analysis.
ArchivesFreesound
A collaborative database of audio samples, recordings, and sound effects uploaded by contributors worldwide and licensed for free use.
ArchivesStandard Ebooks
A volunteer project that produces carefully formatted, beautifully typeset ebooks of public domain literature — far higher quality than most free ebook sites.
ArchivesBiodiversity Heritage Library
A consortium-backed digital archive of millions of pages from natural history literature spanning centuries, freely accessible online.
ArchivesSmithsonian Open Access
Free access to millions of high-resolution images and 3D models from the Smithsonian Institution's collections, all released for unrestricted use.
ArchivesPublic Domain Review
An online journal dedicated to the exploration of curious and captivating works from the history of art, literature, and ideas that have entered the public domain.
ArchivesDigital Public Library of America
A unified search portal aggregating millions of photographs, manuscripts, books, sounds, and moving images from libraries, archives, and museums across the United States.
Learning ResourcesBartosz Ciechanowski
Interactive long-form articles explaining GPS, mechanical watches, naval architecture, and physics — built with hand-coded simulations you can manipulate in real time.
Drive & Listen
Virtually ride through cities worldwide while listening to their local radio stations, with dashcam footage from over 100 destinations.
Shipmap.org
A stunning data visualization of the global commercial shipping fleet, showing real vessel movement patterns over an entire year.
Goblin Tools
A suite of minimalist micro-tools designed to break overwhelming tasks into small, manageable steps — built with neurodivergent workflows in mind.
OldWeb.today
An interactive web archive emulator that launches real legacy browsers — Netscape, early IE, Mosaic — to surf historical websites as they actually appeared.
CyberChef
The local-first digital Swiss Army knife for analyzing, converting, and transforming data formats through simple drag-and-drop recipes.
Learn Git Branching
An interactive visual sandbox that teaches Git operations by animating repository trees in real time as you type commands.
tldr pages
Community-maintained command-line cheat sheets that show practical examples instead of exhaustive manual pages.
OpenRouter
A unified API gateway that routes requests to dozens of large language models through a single endpoint and API key.
SVGOMG
A visual frontend for SVGO that optimizes SVG files in the browser — stripping metadata bloat and reducing file size with live preview.
OpenCorporates
The largest open database of companies worldwide, aggregating corporate registry data from over 140 jurisdictions into one searchable index.
LegiScan
A cross-jurisdiction legislative tracking engine providing open access to bill texts, voting records, and sponsor data across all 50 US states.
Shodan
The search engine for internet-connected devices — discover exposed servers, webcams, industrial systems, and IoT hardware visible on the public internet.
Piskel
A browser-based pixel art editor with frame-by-frame animation, layer support, and sprite sheet export — no install required.
Pinokio
A browser-based installer that lets you run open-source AI apps locally with a single click — no terminal, no dependency wrangling.
Vim Adventures
A puzzle game that teaches Vim navigation by mapping terminal keystrokes to movement — first few levels free, full game paid.
CryptPad
An end-to-end encrypted office suite providing zero-knowledge collaboration on documents, spreadsheets, and whiteboards.
Old Book Illustrations
A curated archive of high-quality public domain engravings, woodcuts, and lithographs sourced from historical books and publications.
Sandspiel
An elegant falling-sand physics simulation where you paint particles — water, fire, acid, plant life — and watch them interact.
Quicktype
Paste JSON and instantly get type-safe models in TypeScript, Python, Go, Rust, and 20+ more.
Kialo
A structured debate platform that maps arguments as visual pro/con trees.
PolyHaven
A public library of high-quality, 100% free 3D assets — HDRIs, textures, and models.
Scale of the Universe
An interactive scroll through everything from quantum foam to the observable universe.
Poolside FM
A retro lo-fi music stream paired with looping summer vaporwave visuals.
Mathigon
Interactive, visual mathematics textbooks covering topics from fractions to chaos theory.
Perchance
Build and run random text generators for anything — names, stories, loot tables, prompts.
Monkeytype
A minimalist, customizable typing speed test with live stats and dozens of modes.
Zoomquilt 2
Endless zooming artwork that continuously transitions between surreal scenes.
WhatTheFont
Tool that identifies fonts from uploaded images using visual matching.
Radiooooo
Music discovery tool that lets you explore songs by country and decade.
LittleSis
Database mapping connections between powerful people and organizations.
MapCrunch
Random Google Street View explorer that drops you anywhere in the world.
Rewind AI Web Tools Directory
Curated listing of AI and productivity tools organized by use case.
The Pudding
Collection of visual essays explaining cultural and data-driven topics interactively.
A Soft Murmur
Ambient sound mixer that lets you combine environmental noises for focus or relaxation.
Internet Game Database (IGDB)
Comprehensive database of video games with metadata, screenshots, and release info.
Window to the Universe
Educational site explaining space science, Earth systems, and astronomy concepts.
Future Timeline
Interactive timeline predicting future technological, scientific, and societal events.
SearchSystem
Directory of specialized search engines categorized by topic and data type.
FMHY (Free Media Heck Yeah)
Curated directory of free tools, resources, and software across many categories.
Library of Short Stories
Free collection of classic short stories from various authors in a simple reading format.
Zoom Earth
Live global weather map with near real-time satellite imagery and storm tracking.
Remove.bg
Removes image backgrounds automatically using AI in seconds.
Grep.app
Search across public GitHub repositories for exact code patterns instantly.
Desmos
Browser-based graphing and scientific calculator with interactive equation visualization.
Little Big Details
Curated collection of thoughtful micro-design decisions from real products.
Ninite
Installs and updates multiple Windows applications silently in a single batch.
Futurepedia
Curated directory of AI tools organized by use case and pricing.
Every Noise at Once
Interactive scatter-plot map of thousands of music genres with playable samples.
PublicWWW
Search engine for source code snippets across millions of live websites.
Scribble Maps
Draw and annotate custom maps with layers, routes, and location data.
Textise
Renders any webpage as plain text, stripping CSS, JavaScript, and ads.
Udio
AI music generation with fine-grained style controls and high audio quality output.
Suno
AI music generator that turns a text prompt into a full song with vocals and instrumentation.
The Forest
A one-button portal into the weird, personal, and overlooked corners of the internet.
Setosa.io
Interactive visual explainers for math and statistics concepts that are notoriously hard to grasp.
Datasette
Open-source tool for exploring, publishing, and sharing SQLite databases as a browsable web API.
Perma.cc
Harvard-run tool that creates permanent, citable snapshots of web pages to prevent link rot.
Roadmap.sh
Community-built interactive learning roadmaps for every major developer role and technology.
Missing Semester
MIT course teaching the practical CS tools that university curricula skip — shell, git, vim, and more.
tldraw
Collaborative infinite whiteboard with a clean interface and open developer SDK.
Krea.ai
Real-time AI image and video generation canvas with style training and enhancement tools.
PocketBase
Open-source backend in a single Go binary with database, auth, and file storage.
Venice.ai
Private, uncensored AI chat that processes your data locally with no retention.
Liner
AI-powered web highlighter and research assistant with cited summaries.
Build It
Minecraft build catalog with searchable structures, style collections, material lists, hacks, and community posts covering houses, farms, statues, and themed designs.
LightPDF
Browser-based PDF editor for changing text, adding text, deleting content, highlighting sections, and downloading edited files without installing software.
FreeSewing
Open-source platform that generates made-to-measure sewing patterns from custom measurements, design choices, and pattern adjustments for multiple garment types.
MusicGPT
AI music creation suite for songs, beats, vocals, instrumentals, voice changes, stem splitting, editing, and developer API access.
Myinstants
Crowdsourced soundboard site filled with instant-play meme clips, reactions, viral audio, and category-based sound buttons that can be shared or favorited.
ChatLLM Teams
Abacus AI workspace that bundles many top language, image, and video models with deep research, docs chat, coding tools, automation, and team features.
Windows 93
Fully interactive browser-based simulation of a fictional Windows 93 operating system, complete with running applications, games, and layered Easter eggs.
Gambo
AI game creation platform focused on prompt-driven vibe coding, asset generation, monetization hooks, and remixable browser games.
Animagraffs
Educational site publishing animated technical explainers on engines, aircraft, electronics, infrastructure, vehicles, watches, and other mechanical or scientific systems.
freebeat.ai
AI music-video generator that turns tracks, lyrics, and prompts into dance videos, lyric videos, shorts, and beat-synced visual sequences in the browser.
WeLib
Massive online library claiming tens of millions of books and academic papers with direct search for books, articles, magazines, comics, and downloadable formats.
APOB AI
AI creator platform focused on generating virtual influencers, portraits, image-to-video outputs, and customizable AI human personas from prompts or reference images.
Play CS
A browser-based implementation of Counter-Strike 1.6 that allows players to join multiplayer servers directly from a web page.
RocketGoal
A goal-tracking application focused on visual progress bars and milestone management to help users stay accountable to long-term projects.
PaperMe
A web-based reader and UI experiment that applies a high-contrast, paper-like aesthetic to digital text and web browsing interfaces.
Cody
An AI coding assistant developed by Sourcegraph that lives in your IDE and understands your entire codebase to help write and fix code.
90Kids
A nostalgia-focused media portal dedicated to the cartoons, toys, and pop culture of the 1990s, featuring articles and video clips.
iFixit
A massive community-driven wiki providing free repair manuals and teardowns for consumer electronics, vehicles, and household appliances.
Auto Catalog Archive
An extensive digital collection of historical car brochures and catalogs from worldwide manufacturers, dating back several decades.
Musicca
An interactive platform offering free music theory lessons, exercises, and virtual instruments designed for students, teachers, and musicians.
MotionBgs
A library of free, high-quality live wallpapers and animated backgrounds for desktop and mobile devices, categorized by resolution and theme.
iLoveIMG
Online image toolkit for compressing, resizing, cropping, converting, watermarking, background removal, and other batch image edits.
Foldbook Art
Online generator for book-folding patterns that turns words, dates, and symbols into step-by-step instructions for handmade folded book sculptures.
Dungeon Scrawl
Browser-based tabletop RPG map maker for drawing dungeons, towns, and battlemaps quickly, with exports for print and virtual tabletops.
WiFi SPC
Community-powered global directory of free WiFi hotspots with location search, daily updates, and coverage across more than 200 countries.
Napkin AI
Visual AI platform that turns pasted text into diagrams and business-style visuals for presentations, documents, and storytelling.
uMap
OpenStreetMap-based map creator for building custom maps with markers, lines, polygons, layers, and embeddable interactive views.
Cleanup.pictures
Browser-based AI image editor for removing objects, people, text, and small defects from photos using inpainting and retouching tools.
Runable
AI agent workspace that plans and executes end-to-end tasks like making slides, websites, reports, podcasts, images, and videos.
H SuperTools AI Online Web SEO Tools
HSuperTools offers a comprehensive suite of SEO & web AI tools, image converters, editors, and productivity enhancers designed to make your life easier.
The Kid Should See This
Curated collection of smart, curiosity-sparking videos for kids and curious adults.
Kottke
One of the webs longest-running blogs — daily links and commentary on culture, science, and ideas since 1998.
Metafilter
One of the oldest community blogs on the internet, with thoughtful long-form discussion since 1999.
Lobsters
Invitation-only technology link aggregator with tagging, comment threads, and a focus on technical depth.
Hacker News
Social news site focused on technology and startups run by Y Combinator, famous for high-quality discussion.
This Person Does Not Exist
Generates a photorealistic face of a person who has never existed using StyleGAN neural network.
Spacehey
MySpace-inspired social network that lets users build fully customizable profile pages with HTML and CSS.
Neal.fun
Collection of interactive web experiments and games by developer Neal Agarwal.
Marginalia Search
Independent search engine that deliberately favors non-commercial, text-heavy, and obscure websites.
Wiby Search
Search engine for the old web — indexes only simple, hand-crafted websites without JavaScript or tracking.
Vectorizer.ai
AI-powered tool that converts raster images to clean SVG vector files in seconds.
Flowbite
Open-source UI component library built on Tailwind CSS with over 600 components and templates.
Cooltext
Free online text effect and logo generator with hundreds of styles and instant PNG download.
Lottiefiles
Library of lightweight JSON-based animations that embed in web and mobile apps without video files.
Pitch
Collaborative presentation tool with designer-quality templates and real-time team editing.
Unsplash
High-resolution photography library with over 3 million photos free to use for commercial and personal projects.
Fontjoy
AI-powered font pairing tool that generates harmonious font combinations with adjustable contrast.
Rive
Interactive animation platform for creating state-machine-based animations for apps and games.
Spline
Browser-based 3D design tool for creating interactive 3D scenes embeddable in websites.
Figma Community
Free design resources, templates, and UI kits contributed by the Figma design community.
Shortform
Detailed book summaries and analyses that go beyond synopsis to critically examine ideas and arguments.
edX Open Courses
Online learning platform with auditable university courses from MIT, Harvard, and hundreds of others.
Nand to Tetris
Free course that takes you from basic logic gates to building a full computer and operating system.
Crash Course
Free educational YouTube series covering history, science, literature, and more with engaging visuals.
Typing.com
Free touch typing course with structured lessons, games, and progress tracking for all skill levels.
Paul Graham Essays
Archive of essays on startups, technology, and life by Y Combinator co-founder Paul Graham.
The Odin Project
Free full-stack web development curriculum built around project-based learning and open-source resources.
Coursera Audit
University courses from top institutions — many can be audited free without a certificate, though availability varies by course.
Khan Academy
Free world-class education platform covering math, science, humanities, and test prep for all ages.
Zenodo
CERN-operated open research repository for datasets, software, papers, and other research outputs.
Our World in Data Explorers
Interactive data explorers on topics from energy to pandemics, built on curated global datasets.
Dimensions Research
Free research intelligence platform tracking the full lifecycle from grants to publications to policy.
Dimensions
Research database linking publications, grants, clinical trials, patents, and policy documents.
Data Commons
Google project aggregating public datasets from governments and research institutions into one queryable graph.
Connected Papers
Visual graph of academic papers related to a given paper, revealing research lineage and clusters.
Semantic Scholar
AI-powered academic search engine with citation graphs, influence metrics, and paper summaries.
Hugging Face Papers
Hugging Face daily ML papers feed linking research to open-source implementations, demos, and community discussion.
Gapminder
Interactive visualization of global development data across health, wealth, and population over time.
FRED Economic Data
Federal Reserve Bank of St. Louis database of over 800,000 economic time series from hundreds of sources.
Patatap
Press any keyboard key to create sounds and animations — a visual musical instrument in the browser.
The Nicest Place on the Internet
A website that shows strangers giving you a hug through a continuous stream of submitted videos.
Falling Falling
Endlessly falling psychedelic animation that responds to your scroll speed.
Window Swap
Open a new tab to see a random live or recorded window view from someone else home anywhere in the world.
Wikenigma
Encyclopedia of things we do not know — documenting the gaps and unsolved questions in human knowledge.
Geoguessr
Drop into a random Google Street View location and guess where in the world you are.
The True Size Of
Drag countries on a map to compare their true size — reveals how distorted Mercator projection maps really are.
Pointer Pointer
Move your mouse cursor anywhere on screen and it finds a photograph of someone pointing at exactly that spot.
Faded Page
Canadian volunteer project digitizing out-of-copyright books, particularly strong in early 20th century fiction.
Sounds of the Forest
Crowdsourced library of forest sounds from around the world, freely downloadable for any use.
World Digital Library
UNESCO and Library of Congress project providing free access to rare manuscripts and cultural artifacts worldwide.
Prelinger Archives
Collection of 6,000 advertising, educational, and industrial films from the 20th century, all free to download.
NASA Image and Video Library
Official NASA archive of over 140,000 images, videos, and audio files free to use without copyright restrictions.
Chronicling America
Library of Congress archive of digitized historic American newspapers from 1770 to 1963.
JSTOR Open Access
Free access to thousands of academic journal articles and books through JSTOR open content program.
Europeana
Digital platform aggregating millions of cultural heritage items from European museums, galleries, and archives.
Open Library
Internet Archive project cataloging every book ever published with borrowable digital copies of millions.
Screenity
Free open-source screen recorder Chrome extension with annotation tools and no watermarks.
Tableplus
Modern native database GUI for managing PostgreSQL, MySQL, SQLite, and more with a clean interface.
Fathom
AI meeting note taker that records, transcribes, and summarizes calls with highlighted action items automatically.
Obsidian Publish
Turn your Obsidian vault into a public or private website with graph view and backlink navigation.
Reclaim.ai
AI scheduling tool that automatically finds optimal times for tasks, habits, and meetings in your calendar.
Supernotes
Card-based collaborative note-taking app with bidirectional linking and a unique social sharing model.
Pomofocus
Clean Pomodoro timer with task list integration and daily focus session tracking.
Workflowy
Infinite nested bullet point outliner for notes, tasks, and knowledge management.
Focusmate
Virtual co-working platform that pairs you with a stranger for accountability-based work sessions.
Notion Calendar
Standalone calendar app from Notion that connects your Google Calendar with Notion databases.
OverAPI
Massive cheat sheet collection covering keyboard shortcuts and APIs for dozens of languages and tools.
SSL Labs
Free SSL/TLS configuration testing tool that grades your server security and identifies vulnerabilities.
Webhook.site
Instantly generate a unique URL to inspect, test, and debug webhooks and HTTP requests.
Squoosh
Browser-based image compression tool from Google that supports WebP, AVIF, and advanced codec options.
Gitignore.io
Generate .gitignore files for any combination of operating systems, IDEs, and programming languages.
Bundlephobia
Find the cost of adding any npm package to your bundle — size, download time, and composition breakdown.
Transform Tools
Collection of code transformation utilities — convert JSON to TypeScript, SVG to JSX, CSS to Tailwind, and more.
Ray.so
Create beautiful code screenshots with syntax highlighting and customizable themes.
JSONCrack
Visualizes JSON, YAML, XML, and CSV data as interactive node graphs for easier exploration.
Crontab Guru
Visual editor and validator for cron schedule expressions with human-readable descriptions.
Explain Shell
Paste any shell command and get a visual breakdown of every flag and argument with documentation.
Aria by Opera
Built-in AI assistant in the Opera browser with real-time web access, image generation, file analysis, and YouTube translation.
Cohere Playground
Interactive playground for testing Cohere language models — requires a free Cohere account to access.
Mistral Le Chat
Free chat interface for Mistral AI models, including the powerful Mistral Large model.
Wordware
AI application builder that lets you write prompts in plain English and deploy them as APIs or tools.
Poe by Quora
Multi-model AI chat platform giving access to GPT-4, Claude, Gemini, and others in one interface — free account required.
Ora.sh
Platform for building and sharing single-page AI apps and chatbots without writing code.
Merlin AI
AI assistant available as a browser extension and web app, bringing multiple AI models to any webpage or workflow.
Perplexity Labs
AI-powered research and answer engine from Perplexity — searches the web in real time and cites sources inline.
Phind
AI search engine built specifically for developers, with code-focused answers and source citations.
TinEye
Reverse image search engine that finds where an image appears online.
Have I Been Pwned
Check if your email or phone has appeared in a data breach.
Shots.so
Create beautiful mockups and social media screenshots instantly.
Coolors
Fast color scheme generator with export to every design format.
Photopea
Free browser-based image editor that opens PSD, Sketch, and XD files.
MIT OpenCourseWare
Free lecture notes, exams, and videos from over 2,500 MIT courses.
Explorable Explanations
A hub of interactive articles that teach through play and simulation.
Brilliant
Interactive courses in math, science, and computer science through problem-solving.
Statista
Statistics and market research portal aggregating data from 22,500+ sources, with infographic exports and curated industry reports.
Kaggle
Community platform for datasets, machine learning competitions, and collaborative notebooks.
Our World in Data
Interactive charts and research on global development, health, and energy.
Radio Garden
Spin a 3D globe and listen to live radio stations from anywhere on Earth.
The Useless Web
A button that sends you to a random, delightfully pointless website.
Wiby.me
A search engine for the old web — hand-curated personal and hobby sites.
Anna's Archive
Open search engine for books, papers, and educational materials across major libraries.
Wayback Machine
Browse over 800 billion archived web pages spanning decades of internet history.
Archive.org Scholar
Full-text search across 25 million open-access research papers.
Excalidraw
Virtual whiteboard for hand-drawn style diagrams and collaboration.
Raindrop.io
All-in-one bookmark manager with full-text search and visual collections.
Tango
Auto-generates step-by-step workflow guides from screen recordings.
Regex101
Real-time regex tester with explanation, debugger, and community library.
Hoppscotch
Open-source API development ecosystem that runs entirely in your browser.
Observable
Reactive JavaScript notebooks for data visualization and analysis.
Devdocs.io
Unified API documentation browser with instant search across 500+ docs.
Consensus
Search engine that uses AI to surface scientific consensus on any topic.
Elicit
AI research assistant that finds and summarizes academic papers.