Chronicles of Blood is a solo fantasy wargame. The basic game is free, but expansions are $1 each.
Miniatures Rules
1666 Naval Rules For Anglo Dutch Wars
1666 is a set of free wargames rules for naval combat in the Anglo Dutch wars. The game is designed for 1/2400 ships on a 2 inch hex grid. Direct download.
Princes of the East
Princes of the East is a political / military game for the period immediately following the First Crusade. Like all of the Perfect Captain’s game, this one is professionally done, with some amazing graphics.
Dr. Who Exterminate Rules From Warlord Games
Warlord Games offers its Dr. Who Exterminate rules free for the downloading.
Bombers Over Germany Miniatures Rules
Matt Fritz offers a free set of miniatures rules for playing games involving B17 bomber runs over Germany in World War II. Looks like fun.