Floreant POS - Floreant POS :: Open Source Point of Sale – Think POS Think Floreant
OhoShop - OhoShop is a mobile eCommerce platform which creates iOS and Android shopping cart apps for local businesses.
Lightspeed - retail and restaurant point-of-sale, ecommerce, and omnichannel solution
Shopify - Shopify is a powerful ecommerce platform that includes everything you need to create an online store and sell online. Try it free for 14 days.
uniCenta oPOS - Award winning Point Of Sale
WooCommerce - A freely available eCommerce plugin that enables shop facilities on your WordPress website. Functionality enabling extensions & beautiful themes available.