Mailspring - Mailspring is a mail client for Mac, Windows and Linux.
Swell.is - Customizable, API-first ecommerce platform for innovative brands, startups, and agencies.
Geary - Geary is an email application built for GNOME 3.
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.
The Bat - The Bat! is a secure desktop email client for Windows, designed to protect your correspondence against third-parties and to save your time.
Vendure - Open-source headless e-commerce framework for developers