SwiftUI - SwiftUI is an innovative, exceptionally simple way to build user interfaces across all Apple platforms with the power of Swift.
Reapp - An easier, faster way to build apps with React and JavaScript.
ComponentKit - ComponentKit by Facebook: A React-Inspired View Framework for iOS
Onsen UI - HTML5 Hybrid Mobile App UI Framework - work with Angular, React, Vue, Meteor & pure JavaScript. Material & Flat design.
React Native - A framework for building native apps with React
Ionic - Ionic is a cross-platform mobile development stack for building performant apps on all platforms with open web technologies.