Is D production-ready?

[John Petal via Digitalmars-d]

On Monday, 16 June 2014 at 10:24:46 UTC, John Petal wrote:
> Hi!
> A while ago, after my journey with PHP and Python, I've decided 
> to learn C++. However, the more I learned, the more it got 
> complicated. I think what Scott Meyer said in his talk was the 
> main reason: the language was inconsistent; it didn't make 
> sense as a whole. It always needed an extra explanation.
>
> I saw D. "It is unstable!" they said, "There aren't enough 
> tools!" they said. I thought, "If I learn C++, he learns C++, 
> then how the hell alternatives are supposed to rise?" I felt 
> responsible. I wanted to contribute to D community.
>
> So I gave D a shot. People were kind of right – it was hard for 
> a beginner for me to get into. I mean, I spent a whole day 
> trying to make DSFML work. I wasn't trying to produce anything, 
> so I was happy that I spent my time learning those things. I'm 
> getting better – I still don't consider myself as a 
> "programmer," but I'm getting better.
> (Sorry about the storytelling, I just wanted to share.)
>
> Now I want to know if the language is production-ready. I can't 
> really see anything besides abandoned libraries written in D. 
> Is it possible – for example – to write a simple 2D game, or an 
> automation program, or a text editor in D? I know the language 
> is perfectly capable, but I'm not sure if the tools are mature 
> enough.
>
> Does D have a mature and cross-platform GUI library?
> Does D have a mature SFML or SDL binding?
> Are there any advices you can give me?
>
> By the way, sorry for my English.
>
> Thank you!
> John

And I should add:
Would you mind sharing something where you use D actively?

Thank you!
John