PCSX2 is a PlayStation2 emulator for Windows and Linux, started by the same team that brought you PCSX (a Sony PlayStation 1 emulator). Currently, it can emulate thousands of games at full speed
Designed for the Sony Playstation2, Argon, allows you to play multimedia files like XVID, DivX, and MP3. It is based off of the Simple Media Player (SMS) and offers an interface similar to that of the Playstation 3/PSP.
an Open Source Gameboy Emulator for the Playstation.
CPU emulation almost complete, with some video.
Want to promote playstation programming by providing open source code.