Richard Lander on the .NET Blog:
We are excited to announce the release of .NET Core 1.0, ASP.NET Core 1.0 and Entity Framework Core 1.0, available on Windows, OS X and Linux! .NET Core is a cross-platform, open source, and modular .NET platform for creating modern web apps, microservices, libraries and console applications.
They said they would, and they did. Good on MSFT. Likely an incredible amount of work to get this out. And supposedly this is also a deep rewrite of .NET Core.
Google has JAVA (though, they didn't make it), Apple has Swift, and now MSFT has .NET*. All fully open source languages, frameworks, and platforms backed by public companies. A good time to be a programmer.
* MSFT has had .NET forever, it is just that now it is open sourced.