I think this is one you might like....;-).

It's called Open 86, it's open source is in C++ and is an X86 Emulator.

have a look right here: http://sourceforge.net/projects/open86

Hope this helps, I'll continue my searches and post my results here as I find new ones. I know Bochs is pretty wide used, I hear it's not the best codebase to venture into however, I'm sure it works good, but to learn and find your way around in there, I hear they recommend some extra strength Tylenols, take 5 BEFORE you start your venture. LOL.

Maybe not that bad hehe...