PSP Schedule allows you to have basic PDA capabilities by providing schedule and address book functions. This is also the first homebrew program to make use of Arwin van Arum’s P-Sprint text entry system. Changes in v0.25:

12-hour time format (AM/PM) now fully supported

Date is shown in red on the calendar if something is scheduled for that day

Selected items are now shown in red

Address book can now properly display multiple pages of names (L/R trigger to move back/forward pages)

Address book entry display bug fixed

Settings menu bug fixed

Address book entries can now be edited

Other minor changes

http://www.quinnsoft.com/pspschedule.php