Facebook F8 conference

https://www.fbf8.com/

F8 is conference for developer.
Two days of new products, tools, interactive demos and speakers to help you build, grow and monetize your apps.

And you can see video in this time.
(not live)
https://developers.facebook.com/videos

Extras
You can download F8 application
(I think not useful because conference has ended)

Google Play Store: https://play.google.com/store/apps/details?id=com.facebook.f8
Apple Store: https://itunes.apple.com/us/app/f8/id853467066?mt=8

Redex, Optimizing Android bytecode

homepage: http://fbredex.com/
GitHub: https://github.com/facebook/redex

Redex developed at Facebook.

Information about Redex
Blog : https://code.facebook.com/posts/1480969635539475/optimizing-android-bytecode-with-redex