[xigoi]

Don’t you dare forget https://ciechanow.ski/

[jazzpush2]

Good call, I'm sure I've left off a lot of amazing work, and his is certainly top class!

[RationPhantoms]

This is an absolute wealth of information about gravitational mechanics but quite a few of the diagrams were so alien to me that they became undecipherable.

[xigoi]

There is much more than the one article. Check the archives.