React Native Desktop - Build OS X desktop apps using React Native
Bizness Apps - Create your own app or become a reseller and build apps for others
Arbiter IDE - The offline-friendly, in-browser IDE for pure JS prototypes
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!
CodeOnline - A remote and secure workspace powered by VSCode
Dropsource - Mobile development platform for building native iOS & Android apps