Pessulus is a lockdown editor for GNOME, written in Python. It enables system administrators to set mandatory settings in GConf. The users can not change these settings.
Pessulus can be useful on computers that are open to use by everyone, e.g. in an internet cafe, or simply in an office environment where the users should not be able to mess up things.
Read also its initial announcement: http://www.vuntz.net/journal/2005/09/13/316-announcing-pessulus
It has been officially included in GNOME as of version 2.14.
