What you really need is a giant robot to menace the heroes in your miniature wargames. You can get a nice paper model of a killer robot at Ravensblight.
Death On The Seas Ancient Naval Rules
Death on the Seas is a set of free wargames rules for ancient naval warfare. Also, Death On The Seas ship appendix.
Urban Gunstore Paper Model
Here’s a paper model of an urban gunstore. It would be useful in any number of modern urban warfare games.