random, add if you like. but dont be angry if i restructure and remove all your links.

Mapping, Gaming, Singleplayer, Design: http://www.celephais.net/board/

Modding, Coding: http://www.inside3d.com/

NetQuake: http://www.quakeone.com

QuakeWorld, Multiplayer: http://www.quakeworld.nu/

News aggregation: http://www.planetquake.gamespy.com/

Non-english:

Germany: http://www.quake.de/

Brasil: http://www.quakebrasil.com.br

Czech: http://www.quake.cz/ (Quakeworld and other Quake titles)