SPIP is a publishing system for the Internet.  It consists of a bundle of
files, installed in your web account and allowing you to take advantage of a
number of automated tasks: multi-user management, laying out your articles
without the need to use HTML, easily modifying the structure of your site From
the very same application used to browse a site. SPIP enables you to build and
update a site, thanks to a very simple user interface.

WWW: http://www.spip.net/