OpenCart - A free shopping cart system. OpenCart is an open source PHP-based online e-commerce solution.s
Channable - Channable offers an all-in-one tool for online marketing agencies and advertisers, from feed optimization and order sync to ad automation.
Gumroad - An all-in-one solution to sell your work and grow your audience.
GoDataFeed - Comparison Shopping Engine & Data Feed Management
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.
DigitlaDataFeed - Optimize Your Shopping Feeds