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.
Roms Mania - A working online resource for roms.
ROMNation - Rom download site
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.
RomsGet - Download Free ROMs for NES, SNES, GBA, N64, PSX, PS2, PSP, XBOX, GAMECUBE, WII, NDS and more! Works with Windows, Mac, Linux and Android.
CDRomance - Emerging retro gaming website, offering roms, isos, games for mostly old CD based console systems.