Apps to get on Jailbroken iPhone.
 

Just jailbroke mine, I'm not into developing or anything like that. Just looking to grab the apps that made this feature worth having aside from the fact that I can now put it on Tmobile.

Also can I just use itunes to put music on it or do I need a special app for that now?

iTunes still works. Buy PwnTunes if you don't want to use iTunes.

SBSettings, LockInfo, FolderEnhancer, InfiniDock are all worth getting.