Playstation Portable (Sony PSP) becouse of its higher processing power and more complex architecture has proowen to be harder to emulate than GBA or DS, but nonetheless there are PSP emulator programs for
PC that can play many demos and even some commercial psp iso files.
PSPE -first PSP emulator that emulated a part of the console and so was capable of playing homebrew games and demos, but not commercial psp isos. Still it is being developed and we hope that soon it will play all the best games.
Potemkin – an open source Sony PSP emu capable of playing more simle commercial psp games.