The Open Source Zone

Plone is an out-of-the-box ready Content Management System that is built on the powerful and free Zope Application server. It requires minimal effort to set up, is deeply flexible, and provides you with a system for managing web content that is ideal for project groups, communities and intranets.

By default, Plone stores its contents in Zope's built in transactional object database, the ZODB. There are products and techniques, however, to share information with other sources, such as relational databases, LDAP, filesystem files, etc.

Plone runs on Windows, Linux, BSD, Mac OS X, and many other platforms; easy click installers are available for Windows and Mac OS X, and RPM packages are available for Linux.