Joomla is a free and open-source content management system (CMS) for publishing web content. It makes building and managing a website easy.
Joomla is written in PHP and stores data in a MySQL or PostgreSQL database, and includes features such as
RSS feeds, printable versions of pages, news flashes, blogs, polls, search, and support for language internationalization.
As of February 2014, Joomla has been downloaded over 50 million times. Over 7,700 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 content management system on the Internet after WordPress.