Meludia - Listening exercises and to sharpen your ear and music theory skills
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
GNU Solfege - GNU Solfege is free music education software.
Figure - Propellerhead creates world-class software products and services that inspire music makers and provide the foundation for a worldwide creative musical community.
Auricula - Practice your sense of hearing and learn to identify intervals for your musical development.
keezy - A colorful soundboard. Play with music.