Mantic’s Kings of War, Second Edition is now available as a free download. There are also several free Army Books.
I can’t help but thinking that this game is the successor to Warhammer Fantasy, which Games Workshop has essentially abandoned.
rules
Age of Sigmar Free Rules and Warscrolls
In a pretty interesting turn of events, Games Workshop now offers the rules and army lists for its fantasy miniatures game for free.
I actually see this as the final death throes of the game.
Kensei Samurai Rules
Kensi is a set of free wargames rules for samurai warfare ranging from skirmishes to large battles. The rules include a fantasy element, and the world is a not-quite-historical Japan.
Valley Of The Apes Miniatures Adventure Game
Valley of the Apes is designed as an adventure game for kids. Players create their own jungle terrain, scatter the encounter tiles (with hazards or treasures) across the valley, and send bands of toy soldier figures to seek fame and riches.
High Crusade Science Fiction Rules
High Crusade are a set of free wargames rules for 15mm / 25mm science fiction games.