Re:No one cares about D (Score 3, Informative)

I can't think of something with significant market share, but there is now an indie game on Steam written in D: Mayhem Intergalactic

Additionally, D is link-compatible with C. Using C libraries from D is as easy as porting the header files to D. There are a couple of tools for (mostly) automating this process, and quite a lot of the major C libraries have D bindings available.