Noizio - Feeling that the noise of the big city is too much for you to bear?
Vicinity - High Quality Ambient Background Sounds in your macOS MenuBar
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.
THINK thenlive - Location-based social media
Defonic - Create a unique sound environment at home or in the office
chatback - Automatically connect to people around you & chat