The most popular IT communities are Facebook?

Question

Facebook

Dear Habr community, asked this question.
In which communities is the IT community concentrated most of all on the Facebook site?
They are specifically interested in Russian-speaking communities where in the future it would be possible to publish copyright content by analogy with vc.ru or Habr.

I thank in advance all those who responded with specifics, I appreciate the answers of everyone who will help and leave links to foreign communities, including, but it is the Russian-speaking communities that are of interest.

Answer 1

all that you can find ))
FB is not a place for IT