Audio Hero - Over 250,000 royalty free music & sound effects for videos
Defonic - Create a unique sound environment at home or in the office
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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.
Premiumbeat - Premiumbeat.com provides high quality Royalty Free Music.
Noizio - Feeling that the noise of the big city is too much for you to bear?