Lord of the Rings Express is a free print-and-play game based on the cooperative Reiner Knizia game. The express part is that it plays in a more streamlined, faster fashion without apparently losing the feel of the original.
board game
Origins of World War I Board Game
Origins of World War I is a free print-and-play game by legendary wargames designer James Dunnigan. The game was re-implemented as Origins of World War II, an Avalon Hill game now long out of print. From the description:
A political/strategy game in which five players represent the five major nations in pre-World War I Europe. They must compete against each other to achieve each nation’s ‘national objectives’. While actual war is not allowed in the game, the play should show quite clearly how tensions developed to such a high pitch in 1914.
Operation Iraqi Freedom Boardgame
Operation Iraqi Freedom is a free print-and-play hex-and-counter boardgame about the 2003 invasion of Iraq.
Grav Armor Classic Dwarfstar Board Game
Grav Armor is the classic Dwarfstar game of future armored warfare. From the site:
GRAV ARMOR is a fast-moving game of future armored warfare for 2 players. It realistically simulates the high-speed, high casualty combat between streaking gravitic vehicles, surface-effects craft, supersonic fighters, orbital dropships and power-suited infantry. The modular map sections allow scenarios to be played on radically different types of planets (earthlike, molten, frozen or airless).
Pondemonium Board Game
Pondemonium is a free board game of conflict between frogs and turtles.