Overall: Opera Mini/UberTwitter/RobLock
Twitter: UberTwitter
Browser: Opera Mini
Social Networking: FaceBook
Games: GT BlackJack
Messenger: BBM 5.0
Other: RobLock
PodTrapper
(will shortly be adding Honeydew I think, as I've only just started playing around with it and it feels great for the price! To quote someone else from the honeydew thread "you can't go wrong with a VersatileMonkey app".)
SocialScope
Facebook (for stuff that SS can't do)
Ubertwitter (for my second Twitter profile)
Bolt browser