eHopper POS - The eHopper POS system is developed with small businesses in mind.
Odoo Point of Sale - Odoo is an online point of sale solution for retail and restaurants.
Lightspeed - retail and restaurant point-of-sale, ecommerce, and omnichannel solution
SambaPOS - SambaPOS is an open source POS Software for Restaurants.
Floreant POS - Floreant POS :: Open Source Point of Sale – Think POS Think Floreant
A1 Charge Corp - A1 Charge Corp is a leading POS merchant account platform that provides small businesses with the tools they need to accept payments.