Chordify - Chordify turns any music or song (YouTube, Deezer, SoundCloud, MP3) into chords.

keezy - A colorful soundboard. Play with music.

muted.io - A magical collection of interactive music theory tools & visual reference pages for musicians and music producers

Figure - Propellerhead creates world-class software products and services that inspire music makers and provide the foundation for a worldwide creative musical community.

soundrop - Soundrop is an app that allows you to create your own personalized sound track to keep you focused or relax.

Splice - Music creation, collaboration, and sharing made simple.