Drupal is a modular content management system, forum, blogging and community engine. It is database driven and can be used with MySQL, MySQLi and PostgreSQL. Its features include (but are not limited to) discussion forums, Web-based administration, theme support, a submission queue, content rating, content versioning, taxonomy support, user management with a fine-grained permission system based on user roles (groups), error logging, support for content syndication, locale support, and much more. It is considered to be an excellent platform for developers due to its clean code and extensibility, and it can also be used as a Web application framework. License: GNU General Public License (GPL) Changes:
Over 1,600 issues have been resolved. This release has major usability improvements, security and maintainability advancements, a friendlier installer, and an expanded development framework.

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