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Looks like it was made via a collaboration of several core React Native contributors so I'd guess this will be the future of navigation for React Native.

https://github.com/react-community/react-navigation/commits/...

"React Navigation is born from the React Native community's need for an extensible yet easy-to-use navigation solution. It replaces and improves upon several navigation libraries in the ecosystem, including Ex-Navigation and React Native's Navigator and NavigationExperimental components."

Source: https://reactnavigation.org/blog/2017/1/Introducing-React-Na...

I believe this is the new navigation library as was described here : https://github.com/facebook/react-native/wiki/Roadmap

So I would expect that it may well be folded into core react-native in time.