F8: Big technology bets and open source announcements

This post announces the open-sourcing of React Native for iOS, ComponentKit, Year Class, Connection Class, and Fresco. It highlights React Native's ability to build native UIs without WebViews, ComponentKit's declarative UI on iOS, Year Class for performance and network segmentation on Android, and Fresco as a new image library for Android. It also mentions the upcoming Nuclide IDE.