.Most of them are free, but there are also a lot of extensions you have to pay a small sum for. Among all extensions, there are a few that stand out as "best in class". Some of these extensions are presented here. Components for major expansions as commerce, discussion forums etc. Modules for viewing content - slideshow, menus, news shows etc. Plugins for extensions of the Joomla system - Automatic image resizing etc. Web 2.0 extensions - extensions that integrate second nettaplikasjoner in Joomla! Examples include display of images from the flick, Video from YouTube or comments from Facebook or Twitter. This gives a lot of exciting possibilities with your web sites.There are nearly 9400 extensions for Joomla!