Moszen - Moszen is a free web service that provides ambient sounds from natural environments to help you relax and avoid stress in your daily life.
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.
Noises Online - Premium masking sounds
Noizio - Feeling that the noise of the big city is too much for you to bear?
SoliCall Pro - Removes noise & echo from any VoIP call. Can also be used for call recording.
Xero - Xero is online accounting for your small business.