Xamarin - Create iOS, Android and Mac apps in C#
React Native - A framework for building native apps with React
Xcode - Xcode is Apple’s powerful integrated development environment for creating great apps for Mac, iPhone, and iPad. Xcode 4 includes the Xcode IDE, instruments, iOS Simulator, and the latest Mac OS X and iOS SDKs.
Flutter.dev - Build beautiful native apps in record time 🚀
Kony - Kony is a mobile application application development platform that facilitates companies to deliver innovative mobile solutions.
Onsen UI - HTML5 Hybrid Mobile App UI Framework - work with Angular, React, Vue, Meteor & pure JavaScript. Material & Flat design.