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.
Actuflow - App for checking why you use your smartphone before using it
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.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
A Soft Murmur - Ambient sounds to wash away distraction.
DND Me - Schedule Do Not Disturb from your Mac's menu bar
MyNoise - Custom shaped online noise machines. Many Many generic sounds