PPSSPP is a PSP emulator written in C++, and translates PSP CPU instructions directly into optimized x86, x64 and (soon) ARM machine code, using an efficient JIT compiler. PPSSPP can thus run on quite low-spec hardware, including stronger Android phones and tablets, as long as there’s support for OpenGL ES 2.0.

Changes:

* Several scheduling and audio fixes, fixing black screens in Yu Gi Oh games among other things.
* Screen rotation and immersive mode support on Android
* Large improvements to the software renderer (still not really playable, but looks right more often than not)
* New VPL allocator and bugfixes, fixing Pangya Golf performance problems.
* Some mpeg/video playback fixes, fixing Parappa The Rapper and others. Some issues remain.
* Fix save state bugs causing incompatibility between 32 and 64-bit platforms.
* Symbol map/debugger improvements
* Depth buffer copy, fixing Jeanne D’arc. May cause minor slowdowns though, this will be worked around in the future.
* MsgDialog fixes. Saving fixed in numerous games.
* Initial multitouch support on Windows 8 for on-screen controls.

http://www.ppsspp.org/index.html