I found this (closed) SO question asking what Prolog is good for in the real world. (http://stackoverflow.com/questions/130097/real-world-prolog-...)

I think it's a great question, so I'm going to re-ask it here: What do YOU use Prolog for?

One reason why I'm interested in Prolog is because I used to work at a semantic web company[1], and it seems to me like Prolog could work well in that domain.

Thanks for posting this resource. I'd love to learn more. So much to do, so little time!

[1]http://primal.com/