Touch Bar Nyancat - Nyancat on your MacBook Pro's Touch Bar #innovation
ChordIQ - Learn notes, chords, sight reading, perfect pitch and more.
Pock - Display the macOS Dock in your Touch Bar
Scale Heaven - Browse and play any scale/chord, chord progression.
Joytunes - Learn music through mobile games
7Pad Scales and chords - Music instrument and assistant for playing scales and chords.