Pennywise - Cross-platform application to open any website or media in a floating window
Swell.is - Customizable, API-first ecommerce platform for innovative brands, startups, and agencies.
PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
Vendure - Open-source headless e-commerce framework for developers
Shopify - Shopify is a powerful ecommerce platform that includes everything you need to create an online store and sell online. Try it free for 14 days.
Headless Commerce Resources - Curated collection of the best commerce resources