Drupal is a free software package that allows you to easily organize, manage and publish your content, with an endless variety of customization.
Concrete5 is not only a powerful CMS, but can also be used as a framework for developing web apps. Designing sites is easy, and can be done at a variety of levels.
WordPress is a content management software that you can use it to create a beautiful website or blog. WordPress is free, but the kind of features and ease of utilization are priceless.
Magento is an open-source platform enriched with features that provides abundant flexibility and control over the look, content and functionality of the eCommerce Store.
OpenCart is designed feature rich, easy to use, search engine friendly and with a visually appealing interface.
Joomla! is the mobile-ready and user-friendly way to build your website. Choose from thousands of features and designs.