While Drupal is not one of the most preferred open source CMS (content management systems) available these days, its concentration on deep management and customization functions perfect for complex websites has led it to be utilized on some popular and very large websites, such as quite a few busy news websites and WhiteHouse.gov.

But in terms of ease of flexibility and use, Drupal has delayed behind more well-liked competitors like WordPress. On the other hand, with the release of Drupal 7, the open source content management system has considerably overhauled much of the core of the product and has taken several considerable strides towards becoming a more easy to use -- but nonetheless powerful -- CMS.

Installing Drupal 7 is comparatively painless and the content management system can run on any program that could run PHP and MySQL, which consists of both Linux and Windows systems. Upgrading from version 6 might be a difficult task, given the numerous modifications in the core of this release, specifically if your website has a lot of configurations and custom code.