Burning Rome: Barbarian Uprising is a free print-and-play, standalone expansion for the commercial game, Burning Rome. It’s free because right now, it is in the prototype stage, so I suspect it won’t be up long.
Both Barbarian Uprising and the original Burning Rome are two player card games are two-player, deckbuilding, tactical card games.
Napoleon at Chattanooga is a free print-and-play board game. The authors write:
Napoleon at Chattanooga (NaC) is a painstakingly-researched, meticulously accurate simulation of Napoleon’s campaign in the Tennessee Valley. It is also a two-player game of exploration and conquest in the Solar System, which is also painstaking but not necessarily accurate.
Axemen and Allies is an fantasy/medieval variant for Axis and Allies.
For many decades, the rules for the Royal Game of Ur were unknown. The board and pieces were discovered in Iraq in the 1920s, but no one knew how to play. It has long been speculated that it is the predecessor of modern backgammon.
Now, thanks to deciphering a table, Irving Finkel of the British Museum thinks he has the rules. Videos below:
Doomrealm is a print-and-play, roll-and-write game with a dungeon crawling theme.