Here is an emulator for the Sony portable console.. free and open source it runs on Windows, Linux, Mac, Android and other systems.

Play your PSP games in HD!

PPSSPP can run your PSP games on your PC in full HD resolution, and play them on Android too. It can even upscale textures that would otherwise be too blurry as they were made for the small screen of the original PSP. Even on modern Android phones and tables, you can often run at double the original resolution.

Features:

-Play in HD resolutions and more
-Play on a tablet for big-screen mobile gaming
-Save and restore game state anywhere, anytime
-Crank up the anisotropic filtering and texture scaling
-Continue where you left off by transferring saves from your real PSP

If you want to support the project, buy the Gold version, it is the same version as free but doing so you will support developer and further development.

Link to Official Site