Nootka is an application to learn classical score notation.
It helps to understand the rules of reading and writing scores
and helps with developing skills of playing and singing notes.
Simply: users looks at piece of a score, plays it, Nootka is listening to it, checks and shows was it played well. All in real time.
Market link: net.sf.nootka
Web site: http://nootka.sf.net
Source code: https://sourceforge.net/projects/nootka/files/Nootka-1.2.7/nootka-1.2.7-source.tar.bz2/download
Code license: GPLv3