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.
Be Focused by XWaveSoft - Simple Pomodoro timer in your Mac's menu bar
Noizio - Feeling that the noise of the big city is too much for you to bear?
Flow - Stop managing projects from your inbox.
MyNoise - Custom shaped online noise machines. Many Many generic sounds
Otto - Otto is a full-service advertising, web development, and public relations agency.