EarMaster - Professional software for ear training and practical music theory on Windows and Mac.
keezy - A colorful soundboard. Play with music.
Ear Teacher - Ear Teacher is a music theory and ear training application.
Figure - Propellerhead creates world-class software products and services that inspire music makers and provide the foundation for a worldwide creative musical community.
Meludia - Listening exercises and to sharpen your ear and music theory skills
Splice - Music creation, collaboration, and sharing made simple.