Pomodoro Desktop Description:
Pomodoro Desktop is a simple but effective way to manage your (coding) time, and it's based on the Pomodoro technique.
Pomodoro stays silently on your status bar. You can only start/stop it or make interruptions. Pomodoro discreetely notifies you of important Time events using Growl or spoken notifications.
Operating System Support: Mac OS X 10.5 or later.