Odoo Point of Sale - Odoo is an online point of sale solution for retail and restaurants.
Oracle NetSuite - NetSuite is the leading integrated cloud business software suite, including business accounting, ERP, CRM and ecommerce software.
SambaPOS - SambaPOS is an open source POS Software for Restaurants.
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!
Floreant POS - Floreant POS :: Open Source Point of Sale – Think POS Think Floreant
UniCommerce - Web-based multi channel order fulfillment software.