Drupal

Drupal is a free software CMS that allows an individual or a community of users to easily publish, manage and organize a wide variety of content on a website. Numerous people and organizations use Drupal to power different web sites, including discussion sites, corporate web sites, intranet applications, personal web sites or blogs, e-commerce applications and social networking sites.

The main features enabled by Drupal are: electronic commerce, blogs, collaborative authoring environments, forums, peer-to-peer networking, newsletters, podcasting, picture galleries and file uploads & downloads.

Benefits:

• Open source. It’s upported by a large developer community, it requires no proprietary licensing fees and its long-term ROI not tied to performance of a single vendor firm.
• CMS and effective application framework. Drupal has a clean, extensible code base and many high-quality modules available for add-on capability, as well as highly functional custom modules to accomplish practically any task.
• High performance. This is due to its built-in caching, scalability and easy integration with 3rd party caching mechanisms
• SEO friendly. It features standards-compliant HTML/CSS, it is capable of custom (HTML) page titles, meta descriptions and provides customizable, friendly URLs, permalinks and simple Google Analytics integration (without writing or inserting code).