Neuratron AudioScore - Polyphonic Music Recognition Software. Neuratron AudioScore Ultimate music transcription software.
EarMaster - Professional software for ear training and practical music theory on Windows and Mac.
AnthemScore - Convert wav and mp3 to sheet music.
GNU Solfege - GNU Solfege is free music education software.
Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
LenMus - LenMus is a free program for learning music.