Joomla 1 vote

Joomla is an award-winning content management system (CMS), which enables you to build Web sites and powerful online applications. Many aspects, including its ease-of-use and extensibility, have made Joomla the most popular Web site software available. Best of all, Joomla is an open source solution that is freely available to everyone.

Drupal 2 votes

Come for the software, stay for the community

Drupal is an open source content management platform powering millions of websites and applications. It’s built, used, and supported by an active and diverse community of people around the world.

Use Drupal to build everything from personal blogs to enterprise applications. Thousands of add-on modules and designs let you build any site you can imagine.

Drupal is free, flexible, robust and constantly being improved by hundreds of thousands of passionate people from all over the world. Join us!

Mambo 0 votes

Power in Simplicity!

Mambo is a full-featured, award-winning content management system that can be used for everything from simple websites to complex corporate applications. It is used all over the world to power government portals, corporate intranets and extranets, ecommerce sites, nonprofit outreach, schools, church, and community sites. Mambo's “power in simplicity” also makes it the CMS of choice for many small businesses and personal sites.

Silva CMS Project 0 votes

Silva is a powerful CMS for organizations that manage multiple or complex websites. Features include versioning, workflow system, integral visual editor (Kupu), content reuse, sophisticated access control, multi-site management, extensive import/export facilities, fine-grained templating, and hi-res image storage and manipulation. Content is stored in clean and futureproof XML, independent of layout and presentation.

Refinerycms 0 votes

A Ruby on Rails CMS that supports Rails 3. It's easy to extend and sticks to 'the Rails way' where possible.
Authors: Resolve Digital, Philip Arndt, David Jones, Steven Heidel, Uģis Ozols
Project URL: http://rubygems.org/gems/refinerycms
Source Code: http://github.com/resolve/refinerycms
Bug Tracker: http://github.com/resolve/refinerycms/issues
Wiki: http://wiki.github.com/resolve/refinerycms/
Documentation: http://api.refinerycms.org
Mailing list: http://groups.google.com/group/refinery-cms

Radiant 0 votes

Radiant is a simple and powerful publishing system designed for small teams.
It is built with Rails and is similar to Textpattern or MovableType, but is
a general purpose content managment system–not merely a blogging engine.
Authors: Radiant CMS dev team
Project URL: http://rubygems.org/gems/radiant
Source Code: http://github.com/radiant/radiant
Bug Tracker: http://github.com/radiant/radiant/issues
Wiki: http://wiki.github.com/radiant/radiant
Documentation: http://rdoc.info/projects/radiant/radiant
Mailing list: http://radiantcms.org/mailing-list/