ChordU - Extracts chords from any song, integrated YouTube.
Chordify - Chordify turns any music or song (YouTube, Deezer, SoundCloud, MP3) into chords.
Guitaa.com - Turn ANY song into chords, play along with interactive chords and diagram, transpose, loop, tempo control.
Cello - Weave creates a virtual network that connects Docker containers deployed across multiple hosts and enables their automatic discovery.
Yousician - Learn to play music at home, at your own pace
Riffstation - The web version is Free and you can learn how to play Chords with Youtube Songs.