What are some alternatives?
When comparing Atomize by Quarkly and React Sketch.app, you can also consider the following products
React Rainbow Components - Build your web application in a snap.
Supernova Studio - The world’s first true design-to-code platform 🚀
React Storybook - Develop and design React components without an app.
Sketch Icons - Generate a dynamic icon library in less than 5 minutes
Rebass - React primitive UI components built with Styled System
Timeline for Sketch - Create beautiful timeline animations in Sketch