Young Jacob Marley is a free print-and-play game from Cheapass Games. In it, your task is to make the most by lending money.
Years ago, GDW used to hand out copies of a simple Frank Chadwick game called Battle for Moscow. I’ve got a copy, and have used it to introduce players to board style hex wargaming. If you dont’ have a copy of this classic, you can download it here.
Ryan Scow has a tutorial on making miniature wargames trees from sage brush. They are very good looking.
From the Junior General comes the Battle of Verdun Fast Play Rules. Designed for use with students, the rules are simple and fast. Paper figures also are available.
Ryan Scow has a tutorial on how to make balsa strips look like timbers for use in models of half timbered houses, stairs and other miniature wargames terrain projects.