Until AM - DJ in your browser with this SoundCloud music mixer
Auxy Music Studio - Auxy brings real music creation to iPhone in a simple and inspiring format.
Youtube-DJ - Mix YouTube songs together
ReSlice - Slice your audio with an advanced, rhythmic arpeggiator and FX.
ODJO - DJ music mixer. play, mix, record & share
zMors Modular - Full featured modular synthesizer for iOS