GatsbyJS - Blazing-fast static site generator for React
Bootstrap Zero - Open-source, free Bootstrap templates collection.
React Boilerplate - Offline-first, highly scalable foundation for your next app
Bootstrap Magic - Create your Bootstrap 4.0 themes easily with magic
React Native Desktop - Build OS X desktop apps using React Native
Material Design for Bootstrap 4 - Powerful and free UI KIT for the newest Bootstrap 4 and Material Design