Drupal has been used and adapted by millions of websites across the world and not without reason. This top open source CMS is extremely flexible and robust and has found favour amongst the developer community due to the various qualities it possesses. Across the world, many renowned websites such as virgin.com, weather.com, theeconomist.com and london.gov.uk have applauded its versatility and flexibility, and used the Drupal development framework to their benefit.