From Wikipedia:

The Pomodoro Technique is a time management method developed by Francesco Cirillo in the late 1980s. The technique uses a timer to break down periods of work into 25-minute intervals called "pomodori" (from the Italian word pomodoro for "tomato"), separated by short breaks.

• Configurable. Set pomodoro and break durations.
• History. Provide a name for each task, view tasks from Today, Yesterday, Last 7 Days, Last 30 Days or All Time.
• Statistics. Counts and displays the number of tasks, the total duration and breaks.
• Simple. All changes are auto-saved, just start a task and work!

To run plank, download it from the link below, unpack and execute:

Download link: Plank Pomodoro Timer v0.2