Volusion - The All-in-One Ecommerce Solution.
Avangate - Avangate provides software and SaaS companies with rich eCommerce, partner management solutions and an affiliate network, assisting them to sell software online as well as to manage a global scale with localized shopping, payments, support.
Iterate - Get the feedback you need to build better products
WooCommerce - A freely available eCommerce plugin that enables shop facilities on your WordPress website. Functionality enabling extensions & beautiful themes available.
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.
Shopify - Shopify is a powerful ecommerce platform that includes everything you need to create an online store and sell online. Try it free for 14 days.