Free shopping card software are available on X-Cart.com, Opencart.com and CS-Cart.com. X-Cart is free for small businesses. It has a responsive design and is available in various color schemes. It lets users set up a search engine optimization friendly catalog and supports more than 75 payment gateways.
OpenCart is an open source, multi-language and multi-currency shopping cart system. It lets users create unlimited number of categories and products including downloadable products. It features a discount coupon system and supports multiple tax rates. The free version of CS-Cart supports multiple storefronts and lets users create unlimited number of categories and products. In addition, it offers real-time shipping cost estimation to customers.