My most important apps are:
PhoneAlarm Lite:
Basically, it's a counter for Voicemail, SMS, Email, Missed Calls etc, plus support Profiles, Ringer Management and can even turn off the backlight during a phone call to save battery life. Gives full one-handed support for checking email, voicemail, last dialed number and call history. Nice developer too. A must for any PPC phone.
http://www.pocketmax.net/phoneAlarmLite.htm
AE Button Plus:
Button re-mapper. More importantly, you can assign functions such as Wifi On/Off, Bluetooth On/Off, Task Manager, Vibrate Mode On/Off, etc to any button. Endless configuration. Also, a very responsive developer.
http://www.pocketgear.com/software_detail.asp?id=21070
SmallMenu (Plus):
Replaces the Start Menu with a simple cascading menu, including IE Favorites, Recently Run, Close Apps, etc. There is a free version and an extended shareware version (Plus). Assign it to the Windows button under Settings.
http://www.pocketgear.com/software_detail.asp?id=3146
VGSMail
Simple Push Email solution that avoids using ActiveSync/Exchange Server.
http://www.vgsmail.com/ppc/
NewsBreak:
Best RSS feed program out there. Great use of WM5 smartkeys for ease of one-handed operation.
http://www.pocketgear.com/software_detail.asp?id=15631
