CMS

TYPO3 is a free Open Source content management system for enterprise purposes on the web and in intranets. It offers full flexibility and extendability while featuring an accomplished set of ready-made interfaces, functions and modules.

XOOPS is a dynamic OO (Object Oriented) based open source portal script written in PHP. XOOPS is the ideal tool for developing small to large dynamic community websites, intra company portals, corporate portals, weblogs and much more.

Zope is an open source application server for building content managements, intranets, portals, and custom applications. The Zope community consists of hundreds of companies and thousands of developers all over the world, working on building the platform and Zope applications. Zope is written in Python, a highly-productive, object-oriented scripting language.

eZ Publish is an open source content management system (CMS) and an open source content management framework (CMF).

An integrated web content management and corporate portal server; 100% Java based; Available under a collaborative source license (contribue or pay paradigm); Installed in minutes; Easy to use and to administer; Full Multilanguage and I18N support; Staging environement (Draft & Preview mode); Content Workflow; Content Versioning; Document Management (WebDAV Support); Built-in Portlet-based interface; Built-in support for standardized java web applications and web services (default servlets supported as portlets); Full web-based administration; Integrated with the Apache Lucene Search Engin

Nuxeo CPS is the collaborative web content management solution for Zope.

Users create and manage content in Workgroups and publish them in Publications spaces (Hierarchies) through a dedicated workflow.

Managers can easily set global and local roles for users (Workgroup Managers, Members, Visitors, Reviewers and Readers).

All actions are available through simple web interfaces.

Nuxeo CPS also features:
office documents integration, indexing and conversion to HTML format;
versioning;
attached comments;
custom workflows (with "point and click" editor interface);
"boxes", also known as "portlets"
interactive services (Mailing-lists);
skinning of hierarchies.

DotNetNuke is an Open Source hybrid of the IBuySpy Portal. Its management team is dedicated to the ongoing management of core portal application enhancements. DotNetNuke provides automated content management capabilities and tools to maintain a dynamic and 100% interactive data-driven web site.

The Rainbow project is an open source initiative to build a comprehensive content management system using Microsoft's ASP.NET and C# technology. A VB version is also available.

Midgard CMS is a stable and flexible Open Source Content Management System built on the popular LAMP (Linux, Apache, MySQL and PHP) platform.

Apache Lenya is an effort undergoing incubation at the Apache Software Foundation, sponsored by the ASF's Cocoon project. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.

Apache Lenya is a Java-based Open-Source Content Management System. It is based on open standards such as XML and XSLT. One of its core components is Cocoon from the Apache Software Foundation.

Lenya supports inline WYSIWYG editors. Your site editors do not have to learn XML. This is possible thanks to the support of XML, XSLT and XML Schema on the client side. An adminstration interface allows advanced users to monitor the CMS, and perform configuration tasks.

umbraco is a free, stable and standard-supporting cms that is easy to use. You get the best from both worlds by having an open source cms that has a fully open api, full source code included, a helping and growing community.

umbraco is fast to learn for both developers and content contributors. It's based on the Microsoft .NET platform and is using w3c standard technologies like XML and XSLT for template building while still being fully open for integration using any .NET language like c#, VB.NET or Delphi. The editor interface is using well known metaphors making it a breeze to use for content contributors.

umbraco is already used and praised by large organisations and companies delivering hundreds of thousands of page views every single day.

Alfresco is the first open source enterprise-scale document management system that includes a modern content repository, an out-of-the-box portal framework for managing and using content designed to work with standard portals, and a groundbreaking Common Internet File System (CIFS) interface that provides Microsoft Windows file system compatibility. Alfresco takes the lessons of building document management systems for the last 15 years and applied them to build an open source content management system that is easier to use, more scalable and more adaptable.

Joomla! is one of the most powerful Open Source Content Management Systems on the planet. It is used all over the world for everything from simple websites to complex corporate applications. Joomla! is easy to install, simple to manage, and reliable.