GoodBarber - GoodBarber is a mobile app creation platform.
Glimmer - Fast and light-weight UI components for the web
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!
Svelte - Cybernetically enhanced web apps
Dropsource - Mobile development platform for building native iOS & Android apps
Preact.js - Preact is a fast 3kB alternative to React with the same modern API. Components & Virtual DOM.