Drupal is a free and open source CMS (Content Management System) written in PHP. It is distributed under the GNU General Public License and it’s used to create different types of website (personal blogs, corporate sites, web agency sites, ecc). Drupal, like the other CMS, have an admin back-end where to manage the whole website without knowledge of web programming.

Like the other CMS (Joomla, Mambo, WordPress), Drupal also has the ability to change their appearance through templates. Here you are a lot of templates for Drupal. You can buy basic version or customize and make them unique.