WooCommerce - A freely available eCommerce plugin that enables shop facilities on your WordPress website. Functionality enabling extensions & beautiful themes available.
Zoho Inventory - Zoho Inventory is an online inventory management software ideal for small businesses. Simplify your inventory and order operations. Try for FREE!
Jumpseller - Start Your Online Store! Grow your business.
TradeGecko - TradeGecko (now QuickBooks Commerce) is inventory management software for ecommerce and wholesalers - simplify your inventory & order operations with powerful inventory management, multichannel selling, inventory reports and more!
OpenCart - A free shopping cart system. OpenCart is an open source PHP-based online e-commerce solution.s
Fishbowl Inventory - Fishbowl offers manufacturing and warehouse management solutions for QuickBooks.