The document discusses popular e-commerce content management systems (CMS), including WordPress, Magento, Opencart, PrestaShop, Virtuemart, and Shopify. It provides an overview of each platform's features, such as being open source or licensed, ease of use, available features, and performance. The most widely used platforms are WordPress, which has the most users but limited features, and Magento, which has the most features but is also more complex and resource-intensive to use.