Hello
This french/english python/gtk program for Linux and XO (OLPC) is a music software coming with a scales/chords catalog, displaying relations between scales/chords and pictures on how to play these on music instruments (piano, clarinet, guitar, harmonica, recorder).
Simple sound has been added to hear the scales and chords...
A screenshot :
http://sourceforge.net/project/screenshots.php?group_id=246342&ssid=95296
To download :
http://sourceforge.net/project/showfiles.php?group_id=246342&package_id=300548
If you have any questions...
Bye