Simple and useful time tracker. Collects tasks and works (timeslots) in hierarchical tree. Has: reports (based on xslt templates), localization (7 langs), xml data format, ical, jnlp and JIRA (R) support. Runs on Windows, Mac and Linux.
The code at GitHub: https://github.com/TimeSlotTracker/timeslottracker-desktop
The git on Source forge is read only (replica).
Goal of this project is, creating a calculator that can handle all date and time operations that a user may need.
You can operate with milliseconds as months, years or dates.
Examples:
2013-11-25 + 3d => 2013-11-28
2013-11-25 - 2013-10-20 => 36d 1h
5h + 6h => 11h
1382220000t => 2013-10-20