Plone

Plone CMS is a free and open source content management system built on top of the Zope application server. Plone can be used for any kind of website, including blogs, Internet sites, web-shops and internal websites. Plone is released under the GNU General Public License (GPL).

MediaWiki's "Monobook" layout is based partially on the Plone style sheets. The United States FBI uses Plone CMS.

Plone runs on the Zope application server, which is written in Python. Plone by default stores all information in Zope's built-in transactional object database (ZODB). Plone will run on Windows, Mac OS X, and Linux, along with other operating systems.

Plone supports skins and themes. When working with Plone, templates can be used to customize a website's look. These templates are written with Cascading Style Sheets. In addition, Plone comes with a user management system called Pluggable Authentication Service (PAS). PAS is used to properly sort actions from different users to their respective folders or accounts. PAS is also used to search for users and groups in Plone. Most importantly, PAS covers the security involved for users, requiring authentication in order to log in to Plone.

Plone is secure. Plone has the lowest number of reported lifetime and year to date vulnerabilities when compared to other popular Content Management Systems. This security record has led to widespread adoption of Plone by government and non-governmental organizations, including the FBI.