Manage your tasks with this tool. knowTime is a simple, unobstrusive tool that helps you to realise how you are spending your time. Objective is to help you in increasing your focus and productivity.
knowTime allows you to define a heirarchy of tasks with notes.
In the Tasks pane, you can define some tasks by using the + button. Then you can add further sub-tasks by right clicking on any task and using the context menu. You may add notes for each task as well in the right side notes pane.
Once this is done, you can right click on any task and select Start Timing from the context menu.
Once the application is minimised, it reduces to a notiication icon on your system tray.
One can change one's Status of the current task, using the context menu on the notification icon. The context menu is generated dynamically based on the tasks that were added.
In the next tab, a time log displays the tasks and duration for each, in a list view.

The license of this software is Free, you can free download and free use this timesheet software.