The document outlines eight popular content management systems (CMS) including WordPress, Drupal, Joomla, SilverStripe, Concrete5, Frog CMS, dotCMS, and Contao, highlighting their key features and functionalities. These systems simplify content publishing, editing, and maintenance on the web while offering varying levels of customization and community support. Open-source options like WordPress and Joomla are emphasized for their ease of use and extensive resources for beginners.