GEDKeeper - opensource and crossplatform genealogy management program
Cross-platform real-time strategy game (3D)
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Alternative Teeworlds Client with many exciting features!
3D-Accelerated open-source DOOM engine
Turn based Civ-like strategy game
Babylon 5 in Homeworld 2!
sauerbraten with LuaJit2 scripting
MicroLua brings Lua on the Nintendo DS for easy programming
A retro style video game engine for RPGs and adventure games.
A Simple Game Engine
AG Content Pack
AdventureMap peripherals for ComputerCraft