This document discusses top CMS tools to start a business in 2021. It introduces content management systems as providing a flexible way to create and publish websites. The document lists important features to look for in a CMS like content organization, customization, and support. It then discusses the top three free CMS options - WordPress, Joomla, and Drupal - highlighting key features of each like WordPress' intuitive interface, Joomla's language support, and Drupal's customization. The document concludes that the best CMS depends on unique needs and hiring a developer may help choose and set up the right system.