EarMaster - Professional software for ear training and practical music theory on Windows and Mac.
Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
GNU Solfege - GNU Solfege is free music education software.
MMA - “MMA—Musical MIDI Accompaniment” is an accompaniment generator.
Perfect Ear - A simple yet advanced application for improving your solfege skills.
Guitar Pro 7 - Create, play and share your tabs