zenmix.io - Ambient background sound generator
Moodly - Get a better sense of focus and relaxation by listening to ambient nature sounds.
Defonic - Create a unique sound environment at home or in the office
Focus - New Tab page that gives you a moment of calm and inspires you to be more productive.
SoundDrown - Ambient sounds to help you focus, relax, and escape
Neurosity - The wearable that translates thought into action