qscore is a suite of tools to parse Quake III: Arena games.log
Nexuiz-Xonotic Client
A fork resurrecting NewWolf (Wolfenstein 3D for OpenGL on Windows)
An FPS.
A Quake III Arena Mod.
glBSP is a DOOM nodes builder
Sourceport of the classic Descent Level Editor
Free and open source FPS based on Quake III Arena
Reference implementation for the Doom game engine.
A second breath of life for Wolfenstein: Enemy Territory