Opencart-api - Opencart-api is an online development platform that allows users to access their OpenCart webshop whenever they want.
API2Cart - Connect your app with shopping platforms. As many as you need. Via one integration.
TrueCommerce - EDI Systems and EDI Software From TrueCommerce – The Industry’s Most Accredited Managed Service EDI Provider By ERP Software Publishers.
Apicart - Add a Shopping Cart to your website, mobile or desktop app in minutes. Code less, do more!
AbanteCart - Free, open source, shopping cart/ e-commerce platform.
Shopping Cart Elite - All in one eCommerce Solution