zMors Modular - Full featured modular synthesizer for iOS
ODJO - DJ music mixer. play, mix, record & share
ReSlice - Slice your audio with an advanced, rhythmic arpeggiator and FX.
Songlio - Free musical guessing game: race friends to name that tune
Auxy Music Studio - Auxy brings real music creation to iPhone in a simple and inspiring format.
BeDJ - Marketplace of detailed mixing instructions to DJ sets