Neonflux - http://neonflux.tripod.com/
Over 100 character sheets for systems in PDF and TIFF format, plus adventures for Dungeons and Dragons and Palladium. |
RPG Hoard - downloadable resources - http://www.rpghoard.com/
Some adventures, fonts, maps, monsters, programs, and other resources for some systems. |
RPGArchive - http://www.rpgarchive.com/
Archive of adventures categorized by genre and system. Accepts submissions. |
The Harrow - http://www.theharrow.com/rpg/
Former roleplaying guide Dru Pagliassotti's archive of articles on roleplaying, gamemastering, and adventure writing. |
The Keep - http://keep.trawna.com/
A large collection of files, mostly related to RPGs: systems, rule supplements, information about or for campaign settings, adventures and ideas for adventures, other GM aids, fiction, humour, and miscellaneous RPG material. |