ChordIQ - Learn notes, chords, sight reading, perfect pitch and more.
keezy - A colorful soundboard. Play with music.
soundrop - Soundrop is an app that allows you to create your own personalized sound track to keep you focused or relax.
Aftertouch - Aftertouch – 3D MIDI Controller created and published by Kevin Nelson.
muted.io - A magical collection of interactive music theory tools & visual reference pages for musicians and music producers
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.