I like Google Maps since I can access my saved maps on it.
BerryReader for my google reader.
BerryWeather for, well, weather.
Flixster is pretty decent for accessing movie data and showtimes.
Poynt is good as well but don't use it all that often.
Podtrapper for my podcasts as i don't like the functionality of the Blackberry version.
There are others, but they don't get used that much. With almost 300 MBs, you can afford to try stuff out (especially if it is free) to see if you like it or not. If you don't, just delete.
I've been an Upvise user since it was in beta. It combines cloud-sync notes with a quick text-only Wikipedia app and a text-only RSS reader too. I don't use the reader much, but I use the note Wikipedia apps all the time.
Ubizmo
Posted from my CrackBerry at wapforums.crackberry.com
Audible - Need to hear my books
BerryBuzz - just love the disco led
Daily Horoscope - morning jibberish
BB Smart Alarm - I set alarms for various daily events
Still waiting for compatibilty issues to be resolved.
Posted from my CrackBerry at wapforums.crackberry.com
BerryBuzz- I set different colours for different things so I know if its important or not (my bb is mostly on vibrate at work all day so seeing the led lights r good)
Quickpull-use this daily to reboot my bb every night (auto-schedule)
SocialScope - I'm a twitter addict
Dictionary.com App- I'm a huge geek and yes I look up words all the time. Also use the thesaurus a lot too
Jumbles - free word game,identical to Text Twist
Posted from my CrackBerry at wapforums.crackberry.com
must have for productivity: (even without a plan, it works over wifi)
-myTask
-ASAP
-Dictionary.com
-Lister
-Horoscope
-3001 wisdom quotes free
-Telicost
-Hootsuite
-Hangman