Safe Eyes
Safe Eyes is a free and open source program for Linux users to protect against eye strain
Pomodoro
Pomodoro Indicator – free and open source simple software, an indicator that reminds you to take a break
Pomatez
Pomatez is a time management program based on the Pomodoro technique that will help you improve your productivity
KTimeTracker
KTimeTracker is a free and open source program that helps you track time spent on various tasks and projects
Pomotroid
Pomotroid is a free and open source program. Simple, customizable and visually pleasing Pomodoro timer
Tea Time
Tea Time a simple timer application for Linux
Workrave
Workrave – a program to remind you to take a break and perform physical exercises to maintain your health
KTimer
KTimer – free and open source program for executing commands via a countdown timer
hmtimer
hmtimer (Hsiu-Ming’s Timer) – graphical computer shutdown timer and more
Go For It
Go For It – free and open source software for creating to-do lists with a built-in timer