React Native Desktop - Build OS X desktop apps using React Native
LightPaper - Admired by thousands, LightPaper is a powerful markdown editor with features such as Multi-Tabs, Folder Navigator, Distraction Free Mode, Quick Open, Live Preview, Full GFM Support, Math rendering etc.
React Native - A framework for building native apps with React
Markdown Live Preview - Stop guessing about your Markdown formatting 📝
GatsbyJS - Blazing-fast static site generator for React
Typora - A minimal Markdown reading & writing app.