A simple yet effective timer for the pomodoro technique® for Android. However, I'm trying to make this app a motivator as well. To this end, Pomodroido contains a leveling system and will feature Leaderboards, Challenges and Achievements as well.
In preparation for personalized Leaderboards, Pomodroido Pro soon can optionally synchronize your pomodoros and showcase your status on your public profile.
I'm currently working on Leaderboards that will allow you to compare your pomodoros with your friends and coworkers on Facebook.
Next up: Achievements! Are you going to be the most productive worker in the known universe?
Also looking into integration into a tasking/todo system in the future.