Floreant POS - Floreant POS :: Open Source Point of Sale – Think POS Think Floreant
WooCommerce - A freely available eCommerce plugin that enables shop facilities on your WordPress website. Functionality enabling extensions & beautiful themes available.
Lightspeed - retail and restaurant point-of-sale, ecommerce, and omnichannel solution
Jumpseller - Start Your Online Store! Grow your business.
uniCenta oPOS - Award winning Point Of Sale
OpenCart - A free shopping cart system. OpenCart is an open source PHP-based online e-commerce solution.s