Yii Framework - Yii is a high-performance component-based PHP framework best for Web 2.0 development.
Square - Square helps millions of sellers run their business-from secure credit card processing to point of sale solutions. Get paid faster with Square. Sign up today!
Bottle - bottle.py is a fast and simple micro-framework for python web-applications.
Lightspeed - retail and restaurant point-of-sale, ecommerce, and omnichannel solution
hapi.js - Server Framework for Node.js
ITSCircle POS - ITSCircle POS is a point of sale solution for retail stores.