Pomodoro

Pomodoro is a time tracking software for Mac OS X that works according to the Pomodoro Technique. This procedure is followed as with an egg timer, set up a certain amount of time (between 25 - 35 min), work on the task and watches the current result after the time. After 4 cycles Pomodoro suggests to take a longer break. Pomodoro uses Growl or Speech to inform about important information . The functions of Pomodoro can be extended with AppleScript.
Note:
Since version 1.0 Pomodoro's is only in the Mac App Store for a charge available. The last free version 0.31 can be purchased directly by pressing the download button.