Ohh,,man I forgot the best ones
Treo select text ( the easiest way to highlight text )
Cutpaste5 ( beef up that little clip board )
Fatfinger ( never search for those special charetors again and hold your device firmly while typing on big keys, set each keyboard to a different hard key and with a blinking curser your ready to go)
Town compass wrld book (80 meg encyclopedia, all the worlds info in the palm of your hand )
AW geographocal Atlas ( Did they mention a ity you never heard of on NPR today, look it up while doing 65 mph with AW geagraphical atlas :D )
Textras ( the only auto replace text entry around )
Super Memo ( the best, easiest to use flash cards available )
And last but not least Megalauncher, my all time favorite its a file manager, launcher, uninstall manager and back up utility all in one for only 15 bucks! You can customize the skins, icons, backgounds and sounds. Heres a screen shot
