Joomla! Documentation™

The term extension is generic and the following specific extension types are available:

• Component (since ) – adds custom functions to your site that can be selected from menus
• Language (since ) – defines an additional language for your site
• Library (since ) – provides functions to be used by other extensions
• Module (since ) – shows nonessential data in a side box, possibly on multiple pages
• Package (since ) – bundles related extensions
• Plugin (since ) – modifies content in articles or provides functions to extend other extensions
• Template (since ) – define the look, feel, and navigation capabilities of your site