Deno
deno.com
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.
Why it is useful
Runs TypeScript directly without a build step and includes a formatter, linter, test runner, and bundler built in — eliminating most of the Node.js configuration overhead. The permission model (no filesystem or network access by default) makes scripts safer to run from untrusted sources. Deno Deploy provides global edge deployment that feels like serverless but runs your code near users.
More in Developer Utilities
Other developer utilities you might not have heard of.
- LangGraphA 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.
- k6An 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.
- LangFuseAn open-source LLM engineering platform for tracing, evaluating, and monitoring AI applications in production, with prompt versioning, A/B testing, and user feedback collection.
- JSONCrackVisualizes JSON, YAML, XML, and CSV data as interactive node graphs for easier exploration.
- CarbonCreate and share beautiful images of source code in seconds.
- Shields.ioA service that generates badges for READMEs and websites, showing build status, version, downloads, licence and many other live metrics.