Hamster
Hamster is a free and open source program that allows you to keep track of the time of all events of the day in Linux
KAlarm
KAlarm is a free and open source program for setting reminders, as well as for scheduling command launches and sending emails
Getting Things Gnome (GTG)
Getting Things Gnome (GTG) is a free and open source personal organizer/task manager inspired by the “Getting Things Done” (GTD) methodology
QuitCount
QuitCount – free and open source software that shows how much you extend your life and how much money you save by quitting smoking
BreakTimer
BreakTimer is a free and open source cross-platform program to remind you to take breaks, save yourself from RSI and eye strain
RSIBreak
RSIBreak is a free and open source software that periodically reminds users to take a break to prevent repetitive strain injuries (RSI)
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