Can anyone recommend a Time-Clock package?

In a perfect world, it would be an open-source project that sits on my linux
server and uses a MySQL database to track employees' punch in/out times on
different projects. In my mind, I see a web page where an employee enters
(or selects) their ID, enters a password and picks a Job from a list.

They then return to that page to sign out of that job.

Administration should allow for adding/removing employees and jobs live, and
for reporting.

I'm not too whippy at searching freshmeat, sourceforge, etc. Can anyone
point me in the right direction?

-SD