Touch Pro Essentials:
http://forum.ppcgeeks.com/showthread.php?t=42730
Commonly Requested Software:
http://forum.ppcgeeks.com/showthread.php?t=17859
"What can you do w/your touch pro?"
http://forum.ppcgeeks.com/showthread.php?t=57759
For me, the following are MUST-HAVEs:
PPCPimbackup and SPB Backup. I run nightly backups of PPC for my contacts and saved games folder, weekly automated SPB Backups.
Advanced Config and Diamond Tweak - I use both for additional tweaking w/o messing with registry.
PHMRegEdit - Basic regedit.
AEButton Plus - Map multiple functions to one button
Resco File explorer is nice if you need some extra funtionality to File Explorer
Bejewled 2
and G-Alarm - This app is probably one of my biggest must-haves. Lets you set more than 2 alarms, and use things like the g-sensor, mazes and math puzzles for waking up. So nice of an app.
(you can find all these links in the commonly requested apps link above except for maybe a few, which could be found by an easy search of the ole forums)