There is only one ready project in React Component Exchange. But I believe that this project will have a great future. Tight coupling of the Component Exchange site with React UI Builder
https://github.com/ipselon/react-ui-builder (visual tool for building complex UI using React components) will give a start to publish ready to use projects with React components.
Though, there are not many docs about the builder on this site so far, please try React UI Builder. It has very friendly and simple interface.