Chord NOTE - Easily find the right chords to match a melody or musical phrase.
Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
Plugin Boutique - Inspirational MIDI effect that makes finding chords and progressions intuitive and fun
JJazzLab - Fed up with boring backing tracks ? Try JJazzLab!
Chordjam - Creative music composition tool for desktop and iPad.
Guitar Pro 7 - Create, play and share your tabs