Audio Habits - See your top artists and tracks on Spotify

AudioBus - With Audiobus, the revolutionary new inter-app audio routing system, you can connect your...

Doppler for iPhone - A better offline music experience for iPhone

TrueFire - The Best Guitar Lessons Online Fast. Easy. Fun.

Spotalike - Spotify playlist with similar songs, according to Last.fm

Go Button - Go Button is a mobile audio app designed to provide professional playback of music and sound effects for live shows. It provides a creative, self-contained show control system that runs on your iPad, iPhone, or iPod touch.