Noizer - Ambient sounds like Noisli, but free
Noizio - Feeling that the noise of the big city is too much for you to bear?
Defonic - Create a unique sound environment at home or in the office
Ambie - Beautiful white noise app to help focus, sleep, or meditate.
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.
White Noise - White Noise to help you sleep and games to wake you up.