WordPress is a free and open source content management system (CMS) developed on PHP and MySQL. You can use wordpress to create your own website or blog without programming knowledge. Magento is a powerful and flexible open-source e-commerce platform with modular architecture.

Drupal is a free and open source content management framework written in PHP. It is used as a back-end system for at least 1% of all websites worldwide ranging from personal blogs to larger corporate sites.