I'm looking for computer-based The Pomodoro Technique timers with rational that provide cross-platform compatibility. It should not be restricted to a single Windows edition. Currently, I'm using Focus Booster because of its simplicity, but I don't like how it requires Adobe AIR.
Google repeats the same timers over and over again often with a lack of features or experience, and I would like to see more specific options. So, which computer-based Pomodoro timers exist and what are their features?