Noizio is an app that will drown out the noise of the street and allow you to concentrate on the work at hand, increasing your productivity. On the other hand, it can also set the mood for a romantic evening or lull you to sleep, ensuring that you will dream soundly all night long. An ambient sound equalizer app for creating a mixture of ambient sounds available for macOS.
Beddit - A new kind of sleep tracker (No wearable sensors)
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.
Running by Gyroscope - Collect and share your favorite runs — with maps, photos, calories, and other stats.
MyNoise - Custom shaped online noise machines. Many Many generic sounds
NapBot - NapBot is Machine Learning powered sleep tracker for your Apple Watch.
A Soft Murmur - Ambient sounds to wash away distraction.