DuoS Emulator is a NDS emulator for Windows. DuoS started its routes in 2012 and was showing to be a very promising new emulator. It features both a dynamic recompiler and hardware GPU acceleration alongside a software renderer.
The developer had explored the very thorough documentation from No$GBA and the excellent GPU core in DeSuME as he developed his own emulator, giving him a good insight into how the NDS works and the best way to emulate certain features of the device.
This allowed DuoS Emulator to successfully emulate a large part of the Nintendo DS in a very short time and do it with significant speed.
It was a very promising emulator but sadly development appeared to of completely ceased a year after it started. If development was continued DuoS would of surely become one of the best NDS Emulators around.