RecordGram - A studio and production marketplace in the palm of your hand
ReSlice - Slice your audio with an advanced, rhythmic arpeggiator and FX.
Melosity - Melosity offers an online music studio that enables musicians to collaborate on a single or multiple tracks from anywhere in the world.
cassini - Polyphonic Synthesizer for iPhone/iPod touch
Audulus - A universe of sound at your fingertips - Audulus is a modular music processing app
nlog Synth - Professional Virtual Analogue Synthesizer ::: check nlogmusic at YouTube :::