Job Timer/Stopwatch?

Does anyone know of a good (free?) app which can time multiple jobs for billing purposes? A bit like a simple stopwatch but with more than one timer...

Thanks, Lee

There is Project Timer and Project Timer Pro from Script Software http://www.scriptsoftware.com although they are not free, but I use them with my business and they work great.. and you should really go for the Pro version since that's the one that I use and I find it to be a really really awesome piece of software