1-48 Combat is a set of free wargames rules for WWII skirmish, designed for two players commanding a single squad.
Wars of the Roses Skirmish Rules
The Cool Guy or Dweeb site offers a set of Wars of the Roses skirmish rules.
Making Hay Fields and Hay Stacks
Here’s a useful tutorial on modeling hay fields and hay stacks.
The Great War Syndicate
Written in 1889, The Great War Syndicate is about a cabal of wealthy businessmen who plan to start a war between European states so they can profit from selling weapons to both sides.
Count this one as a “wars of futures past.”
Away Boarders War of 1812 Great Lakes Naval Rules
Away Boarders is a neat little game for a little-considered theatre of war: The Great Lakes in the late 18th and early 19th centuries. The author also includes some nice 2-D paper models of the ships, as well as counters.