Stuff I've contributed to:
Citadel Station 13
A simulationist social deduction game. I'm a maintainer for this particular fork; NSFW. Actual programming work done includes overhauling the "dynamic" game mode to be more responsive to changes in game state, a port of C++-implemented atmospherics and optimization of NSFW game systems nobody else wanted to touch.
A high-level memory hacking library for Dwarf Fortress. All of the mods on this page use it extensively. I've contributed various scripts and occasional data structure research to it. My excessive use of DFHack in modding eventually made me come to the realization that it's less "modding" that I enjoy and more "creating game systems that interact with existing game systems", which is why I'm a Space Station 13 maintainer now.