Joomla! is a free and open-source content management system (CMS) for publishing web content. It is built on a model–view–controller web application framework that can be used independently of the CMS.
Joomla! is written in PHP, uses object-oriented programming (OOP) techniques and software design patterns, stores data in general on a MySQL database, and includes features such as page caching, RSS feeds, printable versions of pages, news flashes, blogs, search, and support for language internationalization.