WooCommerce - A freely available eCommerce plugin that enables shop facilities on your WordPress website. Functionality enabling extensions & beautiful themes available.
Cart2Cart - Cart2Cart is an automated shopping cart migration service.
PrestaShop - Create your online store with PrestaShop's free shopping cart software. Build an ecommerce website for free and start selling online with hundreds of powerful features.
Design'N'Buy - Enabling Print Business Online
OpenCart - A free shopping cart system. OpenCart is an open source PHP-based online e-commerce solution.s
InkSoft - InkSoft is the most leading e-commerce platform that is specially designed to fuel sales and simplify overall production in businesses just like yours.