Scale Heaven - Browse and play any scale/chord, chord progression.
Alkarta - Find happenings in your city.
ChordIQ - Learn notes, chords, sight reading, perfect pitch and more.
Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
Scales-Chords - Free online music tools featuring a searchable chord database and chord charts.
Mutronome for iOS - Practice drums with Apple Music