OpenCart - A free shopping cart system. OpenCart is an open source PHP-based online e-commerce solution.s
Zen Cart - Zen Cart
3dcart - We provide ecommerce software, web design and inbound marketing services to help online businesses be more successful.
simpleCart - Simple, free, open source JS shopping cart.http://t.co/wf1MH1ka. tweets from @wojodesign. created by @brettwejrowski
PayKickstart - PayKickstart is the ultimate shopping cart and affiliate management platform, empowering online Entrepreneurs and digital publishers with the tools to sell their products online.
1ShoppingCart - 1ShoppingCart is an online store software to build a secure eCommerce storefront.