Simple. Start stop time recording, just select a task and click record. And Sohnar even offer a free version!
Select a task, click start. Pause or finish and your done
All you need is an internet connection and you can use Airtime anywhere in the world.
As mentioned before, the nice people at Sohnar even make a free version available!
Time Recorder sits discreetly on your desktop and even has a "mini mode" that makes it even smaller.
Save your timesheets, export to Excel for analysis or print out permanent records.