At Wolox, we have developed the React Native Bootstrap to create our RN projects. You'll find a detailed guide to start with your project in its README.
Atom is a highly customizable text editor. It's open source, developed by GitHub and has tons of Packages to extend its functionality. For more information: check Frontend style-guide
React.js (JSX) language support, indentation, snippets, auto completion, reformatting
To install it, run this line in your terminal:
apm install react
An Atom snippet library for React Native
Download it here.