Be Focused by XWaveSoft - Simple Pomodoro timer in your Mac's menu bar
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.
Doropomo - Inverted Pomodoro focused for a truly work/life balance
Noizio - Feeling that the noise of the big city is too much for you to bear?
Flow - Stop managing projects from your inbox.
Xero - Xero is online accounting for your small business.