RetroArch - RetroArch is a frontend for emulators, game engines and media players.
RomWorldOnline - RomWorldOnline is a site committed to SNES ROMS and ROMS for different operating systems and gaming devices.
mGBA - mGBA is an open source emulator of the Game Boy Advance. The goals are speed and accuracy.
NDSEmulator - NDSEmulator is a site completely committed to certain things, and that is Nintendo DS and NDS emulators.
DeSmuME - DeSmuME is a freeware emulator for the NDS roms & Nintendo DS Lite games created by YopYop156.
No$GBA - If you have no money you can play Nintendo DS and Gameboy Advance game.