Joomla is an open source content management system platform for publishing content on the World Wide Web and intranets  as well as a Model–view–controller (MVC) Web application framework. It is written in PHP, stores data in MySQL  and includes features such as page caching, RSS feeds, printable versions of pages, news flashes, blogs, polls, search, and support for language internationalization.

# Multiuser and Multilevel environment: many users can interact and contribute to the development of a Joomla-based site. Users can be assigned to different groups with different privileges;
# WYSIWYG editor - the intuitive What You See Is What You Get editor allows for easy editing of the content online;
# Additional components / modules - the Joomla system can be easily enhanced with additional functionalities from integrating a forum to installing an E-commerce solution;

Features:

    * Global Configuration
    * User Manager
    * Delete
    * Upload
    * Create Folder
    * Install / Uninstall
    * Write Message [mail]
    * Mass mail

Drupal is an Cms system These include the ability to register and maintain individual user accounts within a role-based permission / privilege system, create and manage menus, RSS-feeds, customize page layout, perform logging, and administer the system. As installed, Drupal provides options to create a classic brochureware  website, a single- or multi-user blog, an Internet forum, or a community website providing for user-generated content.

Drupal was also designed to allow new features and custom behavior to be added to extend Drupal's core capabilities. This is done via installation of plug-in modules (known as contrib modules) created and contributed to the project by open source community members. For this reason, Drupal is sometimes described as a content management framework. Drupal is also described as a web application framework, as it meets the generally accepted feature requirements for such frameworks.

Although Drupal offers a sophisticated programming interface for developers, no programming skills are required for basic website installation and administration

A much more serious practical hurdle is installation. Drupal like all CMS solutions is dynamically data-driven which demands dedicated server-side support and some reasonably advanced database handling and set-up; a stark contrast to the inherent simplicity of hosting and posting static HTML pages. In terms of requirements you’ll ideally need an Apache server supporting PHP 4 or 5, MySQL, ModRewrite and local . htaccess files (IIS and PostgreSQL are also supported though to a lesser extent)

    * Community web portals
    * Discussion sites
    * Corporate web sites
    * Intranet applications
    * Personal web sites or blogs
    * Aficionado sites
    * E-commerce applications
    * Resource directories
    * Social Networking sites
    * Electronic commerce
    * Blogs
    * Collaborative authoring environments
    * Forums
    * Peer-to-peer networking
    * Newsletters
    * Podcasting
    * Picture galleries
    * File uploads and downloads