Gnome Pomodoro - This GNOME app helps to manage time according to Pomodoro Technique.
Focus – Productivity Timer - The best Focus timer for becoming more productive every day! The Focus app helps you to stay focused and get things done by working with a pomodoro timer.
Pomodone - Pomodone is the easiest way to track your workflow using Pomodoro technique, on top of your current task management service.
Francis - Francis uses the well-known pomodoro technique to help you get more productive.
TomatoBar - World's neatest Pomodoro timer for macOS menu bar.
Productivity Challenge Timer - Productivity Challenge Timer app is a digital timer that helps you in focusing more on your daily task tracking time usage.