Drupal

Drupal is a free, open-source content management system (CMS) with a large, supportive community. It's used by millions of people and organizations around the globe to build and maintain their websites. You probably use Drupal every day without knowing it, as many top businesses and government organizations use Drupal, like the Government of Australia, Red Cross, Harvard, The Economist, BBC, NBC News, Whole Foods, Cisco, and many, many more.

Drupal is open source software released under the GNU Public License. This means it has inherent benefits--cost, flexibility, freedom, security, and accountability--that are unmatched by proprietary software. For example, Drupal is free to download and anyone can modify and extend the platform. This ensures freedom from vendor "lock in" and it empowers users worldwide to monitor Drupal's underlying code for compliance and security issues and fix them quickly.

Features:

• Flexible and customizable: Drupal is a highly flexible and customizable CMS. You can use it to create a wide variety of websites, from simple blogs to complex e-commerce platforms.
• Robust and secure: Drupal is a robust and secure CMS. It is constantly being updated with new security features to protect your website from attacks.
• Large and active community: Drupal has a large and active community of users and developers. This means that there is a wealth of resources available to help you use Drupal, including documentation, tutorials, and support forums.