Drupal is available under the GNU (General Public License), Where by it’s Free, to use and modify.
SEO Friendly URLs:
With drupal we can rewrite URL to make the addresses both user and search engine friendly using Clean URLs.
Collaborative Book:
Using book features it is possible to create and mantain books written by multiple authors.
Extensible Design:
With a good module design, Drupal allows you to quickly extend it for all your products.
Easy Integration:
Once you have installed Drupal to your website, in no time become an irresistible and loads of modules to integrate.