Glimmer - Fast and light-weight UI components for the web
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!
Preact.js - Preact is a fast 3kB alternative to React with the same modern API. Components & Virtual DOM.
Lightspeed - retail and restaurant point-of-sale, ecommerce, and omnichannel solution
Svelte - Cybernetically enhanced web apps
ITSCircle POS - ITSCircle POS is a point of sale solution for retail stores.