What are some alternatives?
Lightspeed POS - retail and restaurant point-of-sale, ecommerce, and omnichannel solution
Odoo - Free ERP and CRM. Download Odoo or use it in the cloud. Grow Your Business.
uniCenta oPOS - Award winning Point Of Sale
ERPNext - The ERP Software that helps you take full control of your business. ERPNext is both powerful and easy to use.
Gazelle Point-of-Sale - Gazelle Point-of-Sale is a cloud web-based POS and inventory software. We have native iPad app, native Android app and offline support. Free POS desktop version available.
Tryton - Tryton is a three-tiers high-level general purpose application platform under the license GPL-3 written in Python and using PostgreSQL as database engine.