Pagan Publishing: 1990-Present
appelcline Though a licensee of Chaosium, Pagan may have been the most notable publisher for Call of Cthulhu in the 90s.
call of cthulhu
Chaosium: 1975-Present
Chaosium originally followed TSR with a war game, White Bear & Red Moon. It introduced the world of Glorantha, which would be better known through RuneQuest.