Does a module / shield exist

Does a module / shield exist that allows you to upload and execute EXE programs or *nix programs?

I have seen a project board that is like a PI with VGA and LAN, well, all the bells and whistles and its the same price as an official arduino and I am wondering if arduino has a board / shield that adds features that this other prototype board has like more memory and running a linux install, for example.

Maybe the Yun or Tre.
Don't have either and never used them but they do have Linux.

recycled PC's ?