Nootka is an open-source application to help with
learning (and also teaching) classical score notation.
Mostly it is for guitarists, but it can be used for
ear training as well.

Features:
Interactive interface to discover the rules of musical notation.
Exercises with the possibility of creating your own sets.
Accurate method for detecting sung and played sounds.
Natural sound of guitars.
Clefs (treble, bass and others) and grand staff.
Analysis of results.
Different kinds of guitars and tuning.
Czech, French, German, Polish and Russian translations.