GMail - gmail ap on your bb
GoogleMaps - view maps and look up locations
GoogleTalk - IM app for your BB
OperaMini - better browser than the one that comes with the blackberry
QuickTipper - if you go out for dinner with friends often
JiveTalk - all IMs in one but costs $30
SoftReset - lets you reboot your BB without popping the battery
ColorPearl - can change the color of your pearl
BBTetris - tetris, not easy to come by
Any of the free games that come on the BB mobile site, type mobile.blackberry.com in your BB browser
Oh and get a 1GB or 2GB MicroSD memory card to store pics and ringtones/mp3s/videos. (
Kingston 1GB Micro SD Card with SD Card Adapter, Model SDC/1GB, FREE STANDARD SHIPPING)