Guitaa is a free online music platform for musicians, that lets them find chords of any song of their choice on Guitar, Piano and Ukulele.
App:
Perfect app for musicians
Sampulator - Make (and record) beats on your keyboard
ChordU - Extracts chords from any song, integrated YouTube.
Auxy Music Studio - Auxy brings real music creation to iPhone in a simple and inspiring format.
Chordify - Chordify turns any music or song (YouTube, Deezer, SoundCloud, MP3) into chords.
Ramsophone - A generative art/music machine. (Be sure to refresh!)
yalp.io - Automatic chords extraction from mp3 and YouTube