Roms Mania - A working online resource for roms.
KillerRoms - Download free Video Games ISOsa nd ROMs!
Gamulator - Gamulator is the n.1 place to find and download all the retro roms, iso's and games for your arcade emulator.
RomsEmulator - This site provides you most of the games roms for different console, Emulators and Bios on one...
Retrostic - Free ROMs download for GB, GBC, GBA, NDS, N64, NES, SNES, Sega, Atari and more. No hidden viruses, just download your ROM and ISO files and play them using an emulator.
DEmul - DEmul is a Sega Dreamcast emulator able to play commercial games.