Hahah!
Well, can't seem to dig up Frank/Peter (may have imagined that one, but I'm sure it exists somewhere in the internet).
But for Punisher/Daredevil, and Daredevil/Spider-man, we have some winners:

http://cyclops-squid.dreamwidth.org/tag/fic:+daredevil for Frank/Matt, that's three fics and one drabble collection by the same author.

http://ofthespider.livejournal.com/21736.html And here is an index of this long and substantial Daredevil/Spiderman universe also written by one wonderful author.

I wouldn't recommend them if they weren't good, either ;)