Hmm, I remember there was a zombie apocalypse fic with House and Wilson - I think it was slash - and Foreman. I don't remember the title or who wrote it.
I also remember pwcorgigirl wrote a series about House and Wilson surviving a global plague, it was really good. I don't think Foreman survived though, just the two of them. It turned out that taking opiates protects you from the disease. At one point House finds Wilson's body and thinks he's dead, but it turns out to be Wilson's brother and House and Wilson are reunited.