Auxy Music Studio - Auxy brings real music creation to iPhone in a simple and inspiring format.
SoundBetter - Marketplace for musicians and music production professionals
ReSlice - Slice your audio with an advanced, rhythmic arpeggiator and FX.
PrimoMusic - An iTunes alternative made to manage iPhone/iPod media files
zMors Modular - Full featured modular synthesizer for iOS
Gemtracks - Buy instrumental backing tracks and beats for $149! Get master ownership and copyright transferred to you once purchased.