[mpeg]

Xamarin / Mono and Unity run pretty much everywhere. Unity even runs on WebGL, none of this is tied to windows stacks.

Also, Microsoft has a great startup programme with Bizspark, we built a company on it a few years ago that eventually ended up as part of a $700m acquisition

[macca321]

And ASP.NET will now run everywhere too (that's one major chunk of this vNext stuff).

[mpeg]

Of course, I was focusing on the current ecosystem. I'm very excited for the future of ASP.NET and C#