Joomla! is an open source content management system (CMS) that allows users to login through a web interface. It provides a control panel to manage content, templates, menus, and global site configuration through modules like a content manager, content editor, CSS editor, template manager, and menu manager.

1. Joomla! Open Source CMS

2. Web based login

3. Control panel

4. Content manager

5. Content editor- WYSIWYG or HTML

6. CSS editor

7. Template manager

8. Menu manager

9. Global configuration