What are some alternatives?
uniCenta oPOS - Award winning Point Of Sale
Lightspeed POS - retail and restaurant point-of-sale, ecommerce, and omnichannel solution
PHP Point Of Sale - Point of Sale software
Path Finder - The Finder, reinvented. Path Finder is an award-winning file browser and management application for Mac OS X.
Floreant POS - Floreant POS :: Open Source Point of Sale – Think POS Think Floreant
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.