FCEUX11
Accurate NES / Famicom emulation, experimental GBA (Beta) support.
...Ongoing internal refactoring and performance optimization keeps the emulator efficient, smooth, and stable even under heavy load. Experimental Game Boy Advance (GBA) emulation support has been added, reusing the existing UI, save-state system, hotkeys and debugging infrastructure; GBA features are in Beta, the picture carries a watermark, and some hardware features are not yet fully implemented.