The Joomla! content management system lets you create webpages of various types using extensions. There are 5 basic types of extensions: components, modules, templates, languages, and plugins. Your website includes the extensions you need to create a basic website in English, but thousands of additional extensions of all types are available. The Joomla! Extensions Directory is the largest directory of Joomla! extensions.
Form Builder
JSN UniForm will bring you the new indulgence since you find out it is the easiest-to-use form extension for your site. Contact us, survey and job application are just some of thousand forms that this single extension can help you to create and control. Besides the intuitive drag-n-drop operation, flexible form presentation and multiple pages layout, JSN UniForm also assists you to deeply understand your collected data with the multiple admins email notification, clean result display or submission filter.
Below is the survey form created by the Free Edition of JSN UniForm.
This extension is NOT included in the template package, but you can download it for free. Read more.
Sous-catégories
Components
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
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.
Templates give your site its look and feel. They determine layout, colors, type faces, graphics and other aspects of design that make your site unique. Your installation of Joomla comes prepackaged with four templates. 
Plugins are small task oriented extensions that enhance the Joomla! framework. Some are associated with particular extensions and others, such as editors, are used across all of Joomla!. Most beginning users do not need to change any of the plugins that install with Joomla!.