Wargaming Miscellany has a post on modifying Heroscape hex tiles.
Then Holler! Tactical Miniatures Rules For The Civil War
Then Holler is a new set of free wargames rules for game set in the American Civil War.
1944 GI’s Guide To Germany
Here’s a pdf of a 1944 GI’s Guide To Germany. Very interesting period stuff.
Thanks to F.H. for the tip.
Building A Shanty Town
For those modern and near-future games, here’s an illustrated tutorial on making a really neat shantytown.