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glquake
http://mfcn.ilo.de/glxquake
Binary code for the game. Designed for use with specific graphic cards.
Quest Linux
http://www.informatik.rwth-aachen.de/I6/Colleagues/kanthak/Quest/quest.html
Contains information about a Linux port of a DOS-based Quake level editor.
Simple DirectMedia Layer
http://www.libsdl.org/projects/quake/
Port of Quake for Linux.
TextMode Quake
http://webpages.mr.net/bobz/ttyquake/
Quake for console freaks and the X-impaired.