Drupal is a free and open source modular framework
and Content Management System (CMS) written
in the programming language PHP.
It is used as a "back end" system for many different
types of Web sites, ranging from small personal blogs
to large corporate and political sites.
Quick Demo with Drupal Overview:
Well-known Drupal-powered sites:
Drupal has been adopted by well-known organizations
including multinational corporations, educational
institutions, governmental departments, and popular
Internet destinations.
Well-known organizations implementing Drupal sites
include the following: