Alderac Entertainment Group (AEG) - 7th Sea, Legend of the Five Rings
Avalon Hill - Axis & Allies
Chaosium Inc. - Call of Cthulhu
Cheapass Games - As the name says, featuring Kill Doctor Lucky
Dark Prince Studios - Swansong
Drive-Thru RPG - PDF downloadable game books
Games Workshop - Warhammer
Mongoose Publishing - Expansive d20 sourcebooks
Palladium Games - Rifts
Pinnacle Entertainment Group - Deadlands
R. Talsorian - Cyberpunk, Falkenstein
RPG net - Gaming reviews and news
Steve Jackson Games - GURPS, Illuminati
West End Games - TORG!
White Wolf - Vampire,Werewolf, Mage, Changeling, Exalted
Wizards of the Coast - D&D d20, d20 Modern
Wizkids - Heroclix, Shadowrun, Star Wars