My Palm Zire 31 uses the following add on applications:

BackupBuddyVFS - registered 
Casino4Wireless -  - freeware, just for fun
CFB Timer v1.2 - freeware
Checkers v2.1 - freeware
Dates v2.11 - freeware
Earth&Sun Color v2.0C - freeware
EasyCalc v1.22 - freeware
eReader v.2.5.3 - freeware
FileZ v6.4 - freeware
GeoDB v1.1 - freeware
Graffiti 1
GreatCircle v2.0 - freeware
IPcalc v1.0
Loan Wizard Pro v3.0 - registered 
MemoWare.com - freeware 
MineHunt 2.0 - freeware
MobileDB v4.1.1 - on Zire 31 CD
PAC-MAN- registered
PIM Support Update - freeware
Ping v3.1 - freeware
Pocket Chess 1.0 - freeware 
Puzzle 2.0 - freeware
RealPlayer v1.5.1 - freeware
RiseSet v2.1 - freeware
Solitaire - on Zire 31 CD
Tic Tac Toe v0.9 - freeware
TimeCopy 1.4 - freeware
Traveler 1.11 - registered 
U.S. Holidays - freeware 

Removing screen scratches

Flitz Metal Polish and Fiberglass Cleaner has worked great for me. 
Available locally or from several sources on the Net. 

Private Records Reminder

Create an Address record with the following in the Company field: 

___ Private Records Are Visible ___ 

Mark the record private. Whenever Show Private Records is selected, this record will be at the top of your Address List as a reminder.