great to discover the world of the emulation, source code vectorization with libraries optimized for Neon if your device support it.
original source code here :
http://code.google.com/p/nintendo-ds-emulator/

some modifications have been made to make it available through intents view. for more information, you can contact me per mail

i absolutely not own any rights with it. Just a convenient way to promote tech used in the app (from physical hardware to emulation and finally optimizations ;) )
DeSmuME source embedded