Joomla is a free and open source content management system
(CMS) for publishing content on the World Wide Web and intranets and a
model–view–controller (MVC) Web application framework that can also be
Joomla is written in PHP, uses object-oriented programming (OOP) techniques (since version 1.5) and software design patterns, stores data in a MySQL or (since version 2.5) MS SQL database, and includes features such as page caching, RSS feeds, printable versions of pages, news flashes, blogs, polls, search, and support for language internationalization.
As of March 2012, Joomla has been downloaded over 30 million times. Over 10,000 free and commercial extensions are available from the official Joomla! Extension Directory, and more are available from other sources. It is estimated to be the second most used CMS on the Internet after WordPress.
Joomla was the result of a fork of Mambo on August 17, 2005. At that
time, the Mambo name was trademarked by Miro International Pvt. Ltd.,
who formed a non-profit foundation with the stated purpose of funding
the project and protecting it from lawsuits. The Joomla development team
claimed that many of the provisions of the foundation structure went
against previous agreements made by the elected Mambo Steering
Committee, lacked the necessary consultation with key stakeholders and
included provisions that violated core open source values.
The Joomla development team created a website called OpenSourceMatters.org to distribute information to users, developers, web designers and the community in general. Project leader Andrew Eddie wrote a letter that appeared on the announcements section of the public forum at mamboserver.com. A little more than one thousand people had joined OpenSourceMatters.org within a day, most posting words of encouragement and support, and the website received the Slashdot effect as a result. Miro CEO Peter Lamont gave a public response to the development team in an article titled "The Mambo Open Source Controversy — 20 Questions With Miro".This event created controversy within the free software community about the definition of "open source". Forums at many other open source projects were active with postings for and against the actions of both sides.
In the two weeks following Eddie's announcement, teams were re-organized, and the community continued to grow. Eben Moglen and the Software Freedom Law Center (SFLC) assisted the Joomla core team beginning in August 2005, as indicated by Moglen's blog entry from that date and a related OSM announcement.The SFLC continue to provide legal guidance to the Joomla project.