Weblinks (com_weblinks) is a component that provides a structured way to organize external links and present them in a visually attractive, consistent and informative way. Help
This module displays the list of weblinks in a category. Help
The Who's Online Module displays the number of Anonymous Users (e.g. Guests) and Registered Users (ones logged in) that are currently accessing the Web site. Help
Components are larger extensions that produce the major content for your site. Each component has one or more "views" that control how content is displayed.In the Joomla! administrator there are additional extensions suce as Menus, Redirection, and the extension managers.
Modules are small blocks of content that can be displayed in positions on a web page. The menus on this site are displayed in modules. The core of Joomla! includes 17 separate modules ranging from login to search to random images. Each module has a name that starts mod_ but when it displays it has a title. In the descriptions in this section, the titles are the same as the names.