BenZeit is a little timer application with wich you can count the time for several tasks. For easy use, it will hide in the taskbar. Just right click on it and select the actual task - it will then assign the timer to this task. If the task does not exist, you can directly add it over the taskbar menu.
All actions will be logged and when you exit the application, you will be asked to save the log.
The Visual Basic source code is included.