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.
Noizio - Feeling that the noise of the big city is too much for you to bear?
Mubert - Craft high-quality content using next-gen royalty-free music powered by AI.
zenmix.io - Ambient background sound generator
MyNoise - Custom shaped online noise machines. Many Many generic sounds
Hear - Hear is a sound enhancement application for the Mac.