Bandlab - Capture, nurture, and collaborate on song ideas in the cloud
Soundworks - Sound meditation without the bells and whistles—or gongs.
Krue - Twitch for music: live streams from amazing musicians
Vindora - Relaxing alpine ambients to keep you calm
Soundscape - Sync your music with the open source community
Endel.io - Personalized sounds to help you focus and relax