MorphGear – Classic, universal game consoles emulator for Windows and Pocket PC

MorphGear was ever a very powerful and celebrated multiple game consoles universal emulator (basically a frontend) that lets you emulate different console systems by using different emulator modules. It is capable of emulating GameBoy Color, GBA, NES, SNES, GameGear, MasterSystem, Genesis and TG-16. Especially, it's pretty easy to configure and has very good graphics & sound effects, as well as ROM compatibility.