Atomic Rockets
projectrho.com/public_html/rocket
A huge reference on realistic spaceship design, space travel physics and settings for science fiction writers and game designers, part of Project Rho.
Why it is useful
A deep resource for anyone who wants the science to be right, with pages on propulsion, weapons, orbits and space habitats. It is full of sharp, blunt commentary that is as entertaining as it is informative.
More in Hidden Websites
Other hidden websites you might not have heard of.
- MinifeedA discovery site for small independent blogs, collecting their posts into feeds you can browse by topic or follow.
- Internet Game Database (IGDB)Comprehensive database of video games with metadata, screenshots, and release info.
- Damn InterestingLong-form, meticulously researched articles on obscure true stories — history, science, and disasters most people have never heard of.
- Dan QThe personal blog of Dan Q, a long-running site that covers technology, the web, geocaching, travel and everyday life, with posts going back many years.
- dCodeA large set of tools for solving ciphers, codes, puzzles, number problems and games, with explanations of how each method works.
- KiwixSoftware and downloads that let you read Wikipedia and other large reference collections offline, on a phone, a computer or a small device.