BeatStars - BeatStars is a social music marketplace & distribution co.
Scale Heaven - Browse and play any scale/chord, chord progression.
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.
ChordIQ - Learn notes, chords, sight reading, perfect pitch and more.
Tune Me - Tune Me is an amazing mobile app that helps you to record music with more than five hundred beats and rhythms.
Scales-Chords - Free online music tools featuring a searchable chord database and chord charts.