ManicTime - Track your computer usage and use collected data to accurately tag time.
Tomato Timer - TomatoTimer is a flexible and easy to use online Pomodoro Technique Timer
Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
focus booster - focus booster is a simple timer application following the 'Pomodoro technique' for time...
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
YAPA - Pomodoro timer