Headspace - Meditation made simple. Brilliant things happen in calm minds.
Chordify - Chordify turns any music or song (YouTube, Deezer, SoundCloud, MP3) into chords.
Synctuition Meditation Program - Synctuition Meditation Program is a world’s most leading meditation app that comes with brand new 3D sounds that enhance the quality of sleep significantly.
muted.io - A magical collection of interactive music theory tools & visual reference pages for musicians and music producers
Calm - Calm.com can help you reduce stress and increase calm.
soundrop - Soundrop is an app that allows you to create your own personalized sound track to keep you focused or relax.