PSP is a comic book reader for the PSP.

Changes:

v0.9.5 Beta (2007-04-27)
– [Feature] Subdirectory support added
– [Feature] Added optional zoom level or rotation persistence between pages
– [Feature] Adjustable pan rate
– [Feature] Select button now switches between fit to width and full size.
– Ability to save/load configuration
– [Bugfix] Resample algorithms now work as selected, and no more garbling for 8-
bit images.
– [Bugfix] Next/previous comic book menu option now works even if comics on the
memory stick are changed while menu is open.
– [Bugfix] Fixed crash bug when resizing a full-sized page to fit to width.
– And many more minor changes…

http://forums.qj.net/f-psp-development-forum-11/t-release-pspcomic-v095-106170.html