React native is an open-source mobile application framework created by Facebook. It is used to develop applications for Android, iOS, Web & UWP by enabling developers to use React along with native platform capabilities.

Here are some React Native component libraries that will help you while developing React based applications.

https://avocode.com/nachos-ui

https://oblador.github.io/react-native-vector-icons/

https://nativebase.io/

https://github.com/FaridSafi/react-native-gifted-chat

https://akveo.github.io/react-native-ui-kitten/

https://shoutem.github.io/ui/