Germ’s World has a large collection of paper models for wargames in 6mm scale. These would be useful for, say a BattleTech game, or maybe Epic 40k. There are hangars, moon bases, factories, space docks and middle east buildings.
paper model
Here’s an idea for a miniature wargaming scenario: During WWII, a group of US paratroopers, or British commandos are sent to destroy a V-2 rocket base. Of course, to do this, you’re going to need to add a model of a V-2 rocket to your terrain. This website has a free paper model of a V-2 rocket in 1/32 scale. You could easily rescale it on your computer.
Printing and Basing Paper Soldiers
Matt Fritz has some advice on printing and basing paper soldiers for your miniatures wargames.
Land Ironclad Model
There has been a surge in interest in playing “Battles by Gaslight” in 15mm scale. No steampunk miniature wargame would be complete without a land ironclad or two. This 15mm Land Ironclad paper model fits the bill. It is based on one portrayed in a 1903 short story by H.G. Wells. From Ralph Currell.
City Walls Paper Model
Wizards of the Coast has this free 25mm – 28mm wargames model of Intact and Ruined City Walls.