Timmon

Timmon is a fantastic tool for time tracking, and it's entirely free and open-source. When using this tool, you can quickly and efficiently keep track of time spent on all of your different projects.
One of the most beneficial features of Timmon is how it allows you to organize your tasks hierarchically. This means that you can easily see how your work on one project relates to your work on others. Additionally, Timmon supports day, week, month, and year views, so you can examine your productivity across a range of time frames.

Another advantage of Timmon is that it offers JasperReports support. With this feature, you can instantly create monthly reports in a variety of formats, including pdf, html, xls, and csv. This reporting capability makes it easy to review your progress and understand where you're spending the most time.

Finally, it's worth mentioning that all of your data is stored securely in either XML files or an SQL database. You can feel confident knowing that your important time-tracking information is always safe and accessible when using Timmon. Overall, if you're looking for a reliable, powerful, and free time tracking tool, Timmon is definitely worth checking out.