GNU Solfege 3.20.7
Solfege is free music education software. Use it to train your rhythm,
interval, scale and chord skills. It is free software and runs on
GNU/Linux, MS Windows 2000 and newer, Max OS X with some effort,
and possibly other operating systems with the required tools. It should
run wherever you can run Python 2.5, Gtk+ 2.12, PyGtk 2.12.