xart released a Library for PSP developers.

Quote:

This is a simple to use and add to any software you develope for the PSP device, it is also works well without any issue of anykind with BenHur’s intraFont so here is the SXLibary (coreXLib Replacment) that I mainly coded for myself.

Please note that this library has just started and so will grow overtime and the GUI functions and Transition functions were not ready to be fully usable so excluded them untill ready.

http://forums.qj.net/showthread.php?t=147084