Drupal is described as 'Open source software with modular architecture, structured content support, thousands of add-ons, custom themes, and robust security for dynamic web projects' and is a very popular CMS tool in the business & commerce category. There are more than 100 alternatives to Drupal for a variety of platforms, including Self-Hosted, Web-based, Windows, Linux and Mac apps. The best Drupal alternative is WordPress, which is both free and Open Source. Other great apps like Drupal are Ghost, Joomla, Jekyll and Backdrop CMS.