The Warseer forums have an interesting thread on using Games Workshop’s Lord of the Rings battle game to run Warhammer 40K skirmish games.
Pictors Studio has a tutorial on building bug tunnels for your Starship Troopers games. They are constructed out of pink insulation board and look quite nice.
Ok. This isn’t about Miniature Wargaming, but I’ve found that miniature wargamers often are lovers of fantasy and science fiction stories. The Baen Free Library has online versions of lots of Baen novels, including works by David Drake, Eric Flint, Andre Norton and more.
Pictors Studion has an English Civil War rules adaptation of Games Workshop’s Warmaster rules.
Here’s a paper model of a medieval watchtower in 1:140 scale. The site is in German and the babelfish that I used wasn’t very good in translating it, so I can’t tell you much more. 1:140 scale is probably not good for most miniature wargames, but you could easily scale them up when you print.