mGBA
mGBA is a fairly new Game Boy Advance (GBA) emulator. With the project only just starting in 2013 it is one of the newest emulator for the Game Boy Advance around, and also one of the most promising to appear in recent years.
It is loosely based on Web Browser based GBA emulator GBA.js project, however the developers claim very little of the emulators code can be found in mGBA now.
The aim of mGBA is to be fast enough to run on low end hardware without sacrificing both portability and accuracy, and so far early versions of the emulator have proven it can provide all three things, so far proving accurate, portable and very fast allowing it to run smoothly on weaker systems such as the PS Vita, Nintendo Wii and 3DS smoothly.