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by midas007 4445 days ago
There's a few counterexamples, which is a good thing:

iXSystems does a lot of cool community work via FreeNAS, PC-BSD and FreeBSD.

Github (Ruby), thoughtbot (Ruby), Google (Go, Python), Dropbox (Python), AT&T (C++, Ruby), Zurb (Ruby, Foundation), Twitter (Ruby, Scala), ...

missing a bunch and some platforms too.