Star Wars Silent Death is a set of modifications for the excellent Silent Death rules for the Star Wars universe.
Miniatures Rules
Indo-Pakistani Campaign for Not Quite Mechanized
Chris Kemp has a mini campaign for his Not Quite Mechanized rules.
Tac Ant Combat Simulation
Tac-Ant is a set of free wargames rules for battles between hills of ants.
Seriously.
Late Roman Lion Rampant Variant
The I Live With Cats Blog has a variant for Lion Rampant featuring Late Romans.
Battle of Britain Rules and Playing Pieces
The Battle of Britain is a complete strategic game for refighting the epic battle of 1940.