The ioquake3 community effort to continue supporting/developing id's
A modern, cross-platform Quake game engine based on FitzQuake.
Open source FPS/RTS Game
Retro game engine for creating games like it's 1997
Ms Dos port with slopes 3d floors true3d demo compatibility fast speed
Game engine for playing tomb raider 1 - 5 levels.
Game server browser
Quake C mods and support - SSQC / CSQC
A Quake III Arena Mod.
Quake III Arena GPL Source Release
Free and open source FPS based on Quake III Arena