This is something that my immediate team has been pushing for a little while internally and finally announced yesterday: http://blogs.msdn.com/b/dotnet/archive/2014/11/12/net-core-is-open-source.aspx.
This is going to be pretty massive for Microsoft and the community. It will be the biggest code base that we've open sourced and is one of the biggest changes I've seen in the ~13 years I've been using .NET (and now working on .NET). Thoughts?
