Joomla! is a highly-extendable content management system (CMS) licensed under the GNU GPL written in PHP that readily scales from small websites to large projects. Joomla was designed with extensibility in mind — a wide variety of extensions are available for the needs of the audience. Importantly, Joomla can be easily adapted to a wide variety of use cases, including as for a corporate intranet, as an e-commerce platform, or for web presence and information, as is the case for the Guggenheim Museum website, which runs on Joomla.