Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
Neuratron AudioScore - Polyphonic Music Recognition Software. Neuratron AudioScore Ultimate music transcription software.
MuseScore - Our goal is to let musicians from all over the world create and share their works, as well as to make learning music exciting, easy and available for all.
AnthemScore - Convert wav and mp3 to sheet music.
MagicScore - MagicScore is an easy and powerful music notation and composition software.
LilyPond - GNU LilyPond is a computer program for music engraving.