Defonic - Create a unique sound environment at home or in the office
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.
Noizer - Ambient sounds like Noisli, but free
Focus Noise - Productivity sounds and color noises to stay focused at work
Silenz - Mix ambient noise in with the music you're listening to