Bootstrap Zero - Open-source, free Bootstrap templates collection.
NativeBase - Experience the awesomeness of React Native without the pain
Bootstrap Magic - Create your Bootstrap 4.0 themes easily with magic
React Native UI Kitten - Customizable and reusable react-native component kit
Material Design for Bootstrap 4 - Powerful and free UI KIT for the newest Bootstrap 4 and Material Design
React Native Starter - React Native Starter is mobile application template built with React Native that contains essential components for all mobile apps.