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.
Live365 - 5,000+ online radio stations run by real people, not generated by computers.
Noizio - Feeling that the noise of the big city is too much for you to bear?
Streampusher - Start your own internet radio station
MyNoise - Custom shaped online noise machines. Many Many generic sounds
SHOUTcast Radio - SHOUTcast Radio is the home of free Internet Radio.