Links for the EFFiles Link Page
 

Having read this.

Official Sites & Support

http://www.activision.com
http://www.ravensoft.com
http://www.ritualistic.com
http://www.idsoftware.com

Tutorials

http://www.heppler.com/shader
http://bubba.planetquake.gamespy.com
http://www.simonoc.com/pages/articles.htm
http://synapse.vgfort.com

Reference (Resources for Mappers)

http://www.stdimension.org/int/index.htm
http://www.trekcore.com
http://www.strategicdesignpub.com
http://www.st-spike.org
http://www.cygnus-x1.net/links/lcars/blueprints-main2.php

Fan Sites

http://www.ravengames.com
http://www.beer-garden.org/bg2/

Message Boards

http://www.ritualistic.com/forums/forumdisplay.php?f=11
http://www.ubergames.org
http://www.lcarsc.com
http://www.startrek-gamers.com/forum


Some may not seem relevant, like LCARS Central, but they are used for particular reasons. The aforementioned site for example, being that mappers use it for help creating LCARS textures.