Fuse - Fuse is a UX tool suite for mobile app designers and developers.
Vue Storefront - Open Source PWA for any eCommerce
Dropsource - Mobile development platform for building native iOS & Android apps
Square Online Checkout - Create easy pay links for whatever you're selling and start accepting payments everywhere online.
Siberian CMS - Siberian is an Open-Source and Free App Maker. Unlimited Push Notifications. Unlimited features. Fully Customizable. Download it and build your own app now!
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.