Axure - The most powerful way to plan, prototype and hand off to developers, all without code. Download a free trial and see why professionals choose Axure RP 9.
React Boilerplate - Offline-first, highly scalable foundation for your next app
Balsamiq - Balsamiq. Rapid, effective and fun wireframing software.
GatsbyJS - Blazing-fast static site generator for React
Moqups - The most stunning HTML5 app for creating resolution-independent SVG mockups, wireframes & interactive prototypes for your next project
React Native Desktop - Build OS X desktop apps using React Native