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

Moodwill - Create and listen for free to your perfect nature sounds environment with music to help you concentrate, relax, sleep and overall feel better.

Scale Heaven - Browse and play any scale/chord, chord progression.

Defonic - Create a unique sound environment at home or in the office

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

zenmix.io - Ambient background sound generator