ChordIQ - Learn notes, chords, sight reading, perfect pitch and more.
BeatStars - BeatStars is a social music marketplace & distribution co.
7Pad Scales and chords - Music instrument and assistant for playing scales and chords.
ChordChord - ChordChord is a useful mobile app that helps you to create the chord progression to make your music and song right on your mobile device.
muted.io - A magical collection of interactive music theory tools & visual reference pages for musicians and music producers
Tune Me - Tune Me is an amazing mobile app that helps you to record music with more than five hundred beats and rhythms.