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.
AudioRetoucher - AudioRetoucher is a tool for analyzing music, changing tempo and pitch in real time
Chordify - Chordify turns any music or song (YouTube, Deezer, SoundCloud, MP3) into chords.
yalp.io - Automatic chords extraction from mp3 and YouTube
Amazing Slow Downer - !A slow down music software for Mac and Windows computers - Amazing Slow Downer
UltimateGuitar.com - Learn how to play your favourite songs on guitar or ukulele