FocusCommit's answer:
The first Windows app that combine GTD + Pomodoro Timer + Personal Kanban
Tomato Timer - TomatoTimer is a flexible and easy to use online Pomodoro Technique Timer
Pomodone - Pomodone is the easiest way to track your workflow using Pomodoro technique, on top of your current task management service.
Tasklog App - Tasklog App is an agile productivity software designed to meet the needs of current world freelancers.
Pomofocus - A simple and customizable pomodoro timer for the web
YAPA - Pomodoro timer
YAPA-2 - YAPA-2 is a minimalistic desktop timer app for Pomodoro Technique users.