Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
Meludia - Listening exercises and to sharpen your ear and music theory skills
MMA - “MMA—Musical MIDI Accompaniment” is an accompaniment generator.
GNU Solfege - GNU Solfege is free music education software.
Guitar Pro 7 - Create, play and share your tabs
Auricula - Practice your sense of hearing and learn to identify intervals for your musical development.