Noizio - Feeling that the noise of the big city is too much for you to bear?
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.
Sounds of Earth - Listen to relaxing ambient sounds of nature
Defonic - Create a unique sound environment at home or in the office
Ruya - A calming space
Serene - The macOS app to get your focus back