http://taskcoach.sourceforge.net/
Task Coach is a simple but practical time management software.
In reality, we are sitting in front of the computer, often, we will do it.
Or when we do agile development, the user tests, often patches a lot of small problems, how much time each small problem? How long does it take to get a whole test? Don't know? Then use this tool so quickly.
It can set the task you want to complete by level, then through the design timer, let you know how much time spent on each task, so you can accurately according to your own work ability Evaluation. Estimation of work is a skill that must be in any software development process.
In addition, this software is written by Python. I have been very interested in the development of Python this kind of language. It is also interested in the interface of SWT.