First off, get that man in the suit off the top of Gossiprocks!
Anyway not in any particular order...
Looptastic - DJ your own music. Plug into your speaker (car, home) and groove to your tunes.
Battle Bears - shoot the teddy bears before they get too close, or get hugged to death!
Sound Hound and Shazam - because you hear a song and not know the title. These apps can do it for you! Then go download.
iPronuciation - because I need to know what they say in other languages.
Ringtones Pro - basic iPhone ringtones are boring and I don't want to hear some one elses phone ring thinking it's mine.
Mixology - I love playing bartender.
Big Button - press any where on the screen and the picture snaps.