Current Plock version is plock-0.9.tar.gz
Plock is an animated Lemmings xlock. The user can lock the screen with plock for a certain precompiled amount of time, if this expires, the user will be logged out. (In fact, the monitor will be destroyed, as the lemmings carry some explosives with them).
The screen shows a Parking meter while the time is not up, this is why its called plock.
It is useful for student rooms or the like, but I lock my notebook with it too, as the "log-out" feature is optional.
This program was done by Jürgen, with a little assistance from me.