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
ChordU - Extracts chords from any song, integrated YouTube.
Anytune - Anytune is an application that is designed to play songs directly from your iPhone or iPad music library, helping you to adjust tempo and pitch for each song according to your taste.
Chordify - Chordify turns any music or song (YouTube, Deezer, SoundCloud, MP3) into chords.
BattleMe - BattleMe is a useful mobile application that enables you to compete with others in creating rap and rhythms.
yalp.io - Automatic chords extraction from mp3 and YouTube
Audio Trimmer - The simplest way to trim your audio files