I found what I liked by loading all apps I thought may be cool, then finding out which ones I actually used and kept a note of those... then I did a hard reset and set my Axim up the way I wanted (bluetooth hacks, etc...) then installed only the software that I had noted during testing...
One that I like a LOT is Pocket Control... I can control the Axim from my laptop through a WiFi connection on my home network... It's great to be able to work on the Axim with a mouse and keyboard... :)
http://www.pocketgear.com/software_detail.asp?id=1547