OpenCart - A free shopping cart system. OpenCart is an open source PHP-based online e-commerce solution.s
Clearbit - Clearbit provides Business Intelligence APIs
WooCommerce - A freely available eCommerce plugin that enables shop facilities on your WordPress website. Functionality enabling extensions & beautiful themes available.
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
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.
InsideView - InsideView aggregates and curates all the company and contact data, news and social insights, and professional connections you need to do business better.