Spree is an open source E-commerce platform for Rails 6 with a modern UX, optional PWA frontend, REST API, GraphQL, several official extensions and 3rd party integrations. Over 1 million downloads and counting! Check it out:
Reaction is an API-first, headless commerce platform built using Node.js, React, GraphQL. Deployed via Docker and Kubernetes.
A modular, high performance, headless e-commerce platform built with Python, GraphQL, Django, and ReactJS.