pGOX is a shell application for Playstation Portable.

Features:

*Splash Screen
*USB function
*MP3 Player
*Power Management
*MemoryStick Browser
*CPU clock changer
*Help on-screen
*Excute PBP files
*Excute PNG files
*Play MP3 files
*Open/Extract ZIP/RAR files
*Fully skinnable
*Battery icon (Like in XMB)
*Take screenshot

http://forums.qj.net/showthread.php?t=137998