SDL2
Chess engine
A fully compliant, playable chess engine written in Lua and rendered with the Love2D game framework forked from https://github.com/Azzla/chess-engine.
Clockwind
a platform game with time travel mechanichs forked from https://alesan99.itch.io/clockwind
SuperTux
A jump-and-run game starring Tux the Penguin
Tremulous
Aliens vs Humans, First Person Shooter game with elements of Real Time Strategy
boxclip
"Boxclip", a 2D platformer engine, with an emphasis on interactive map editing