ReSlice - Slice your audio with an advanced, rhythmic arpeggiator and FX.
Momixa - Pick two songs and get the perfect mix
cassini - Polyphonic Synthesizer for iPhone/iPod touch
Music Suggestions Ninja - Enter an artist's name & find similar, lesser known artists
nlog Synth - Professional Virtual Analogue Synthesizer ::: check nlogmusic at YouTube :::
Boil the Frog - Create a seamless playlist between any two artists