Selz - Seriously Simple Selling
OpenCart - A free shopping cart system. OpenCart is an open source PHP-based online e-commerce solution.s
Optilead - Real-time eCommerce marketing solutions to reduce cart abandonment.
Shopio - Shopio is an all-in-one hosted shopping cart solution.
Zen Cart - Zen Cart
MagneticOne - MagneticOne offers e-commerce shopping cart software and online services.