I use D2, the second standard of the version. I wrote real-time applications (3D engine, for instance).
The language gets more and more powerful each day. D is very pragmatic and all the embedded features, especially the metaprogramming paradigm, makes it far over C++, in my opinion. The syntax is clearer, you can use the strength of functional programming through functions such as filter or reduce, and one of the most important feature: you can use all the C libs.
Definitely my favourite language, and I’m pretty sure it will be a spread used language.