zenmix.io - Ambient background sound generator
Defonic - Create a unique sound environment at home or in the office
A Soft Murmur - Ambient sounds to wash away distraction.
Ruya - A calming space
Noisli - Noisli is a fantastic background noise and color generator for working and relaxing. Online soothing ambient sounds like White noise, Rain and Coffee Shop.
One Good Thing - Discover a good thing you can do to brighten up your day