Ask HN: What’s your favorite one person labor of love products/games/software

Posthaven[0] by Garry Tan. There's probably others making it happen but from my experience he does support all by himself and is very involved in this project.

[0] https://posthaven.com/

Dwarf Fortress is two people + lots of donors but it's my favourite small team.

Single person, Ultima Ratio Regum: https://www.markrjohnsongames.com/games/ultima-ratio-regum/

Banished (the 2014 game) https://store.steampowered.com/app/242920/Banished/

I'm curious what the developer is doing nowadays

Cog VM, the fast virtual machine that powers open source Smalltalk implementations like Pharo and Squeak. Mostly a labor of love by Eliot Miranda and Clement Bera.