muted.io - A magical collection of interactive music theory tools & visual reference pages for musicians and music producers
Chordify - Chordify turns any music or song (YouTube, Deezer, SoundCloud, MP3) into chords.
Scale Heaven - Browse and play any scale/chord, chord progression.
ChordPic - Create beautiful guitar chord diagrams
Hyperlax - Sit back. Relax. Explore faraway places. Enjoy the music.
Tonaly - Compose songs and practice scales