via http://pdroms.de/

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:
* Atrac3+ plugin no longer required! Thanks Maxim for hard reverse-engineering work
* Many, many emulation fixes, including: bezier/spline curve support, fixing Loco Roco and others, stencil clear emulation, fixing Final Fantasy IV text
* Android-x86 support
* Post-processing shaders like FXAA, scanlines, vignette
* More solid save states (we will try to keep them working from now on. Save states only upgrade forward, not backward to older versions though)
* Change render resolution independently of window size
* Massive debugger improvements on Windows, by Kingcom and unknownbrackets (GE)
* Win32 menu bar is now translatable. Language changes are applied instantly.
* Win32: Ability to store PPSSPP’s config files and memory stick files in places other than the same directory
* Qt audio fixed, Symbian audio and ffmpeg is now threaded for more consistent media processing
* Haptic feedback support for mobile devices
* Accurate system information for mobile devices
* Analog controller support for Blackberry
* Windows installer (coming soon)
http://www.ppsspp.org/index.html