Sight Reading Machine - Computer generated music for sight reading practice
ChordIQ - Learn notes, chords, sight reading, perfect pitch and more.
Mutronome for iOS - Practice drums with Apple Music
muted.io - A magical collection of interactive music theory tools & visual reference pages for musicians and music producers
Soundslice for Teachers - Teach music better.
7Pad Scales and chords - Music instrument and assistant for playing scales and chords.