This is a simple Pomodoro app I setup as an execuse to start playing with the Kivy GUI framework. I've found Kivy to be interesting and simple to use.
To run the app, install python 2.7.9 and kivy 1.8.0. Then from the src dir run,
kivy main.py
FYI: "The Pomodoro Technique is a time management method developed by Francesco Cirillo in the late 1980s. The technique uses a timer to break down work into intervals traditionally 25 minutes in length, separated by short breaks." Read more [wikipedia],