Roms Mania - A working online resource for roms.
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.
KillerRoms - Download free Video Games ISOsa nd ROMs!
RomsEmulator - This site provides you most of the games roms for different console, Emulators and Bios on one...
CoolROM - Download from the largest and cleanest ROMs and emulators resource on the net. Mobile optimized. Systems include N64, GBA, SNES, NDS, GBC, NES, MAME, PSX, Gamecube and more.
DEmul - DEmul is a Sega Dreamcast emulator able to play commercial games.