ReSlice - Slice your audio with an advanced, rhythmic arpeggiator and FX.
Gnoosic - Even if you don't know what you are looking for - gnod will find it.
nlog Synth - Professional Virtual Analogue Synthesizer ::: check nlogmusic at YouTube :::
Musicroamer - A visual Pandora for discovering new music
cassini - Polyphonic Synthesizer for iPhone/iPod touch
TasteDive - TasteDive recommends similar music (musicians, bands), movies, TV shows, books, authors and games, based on what you like.