Scale Heaven - Browse and play any scale/chord, chord progression.
Visualify - Visualize your top artists on Spotify
ChordIQ - Learn notes, chords, sight reading, perfect pitch and more.
SYQEL - Bring your music to life
Scales-Chords - Free online music tools featuring a searchable chord database and chord charts.
Kaleidosync - Kaleidosync is an all-in-one Spotify music visualizer that is all set to deliver a top-notch music experience with real-time support.