GameStreamer - Connection people and games anywhere.
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.
LabChirp - Create simple sound effects on Windows.
Roms Mania - A working online resource for roms.
Apple Game Center - Game Center brings social gaming to OS X and iOS apps.
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.