Drupal is a open-source platform for web development that is used for online content and user communities. Drupal is used by some of the busiest sites on the internet, and can be adapted to any visual design virtually. Drupal is running over a million sites such as WhiteHouse.gov, World Economic Forum, Stanford University and Examiner.com.
Drupal is also a open source content management framework written in PHP language. It is used as a backend support framework for at least 3 parentage of all websites across worldwideweb ranging from corporate, political, and government sites to personal blog.