Hello all. I believe that on this page: http://www.zeromq.org/intro:get-the-software the "git repo" link for "Unstable release 3.0" should be https://github.com/zeromq/zeromq3-0, however it is https://github.com/zeromq/zeromq2-1/commits/v3.0.0. Best regards, Attila Balazs.