Schweitzer Comics offers a very nice paper model Nativity Set. It’s not quite free, but it is “pay a fair price.”
Papercraft Nativity Set
Model Railroad Layout Based On Lovecraft’s Arkham
The Miskatonic Railroad is an HO scale model train layout based on HP Lovecraft’s Arkham in 1908. It is absolutely gorgeous to look at.
Arquebusier Renaissance Skirmish Rules
Arquebusier is a set of free wargames rules for skirmish games set in the Renaissance.
Ram or Die – Battle of Salamis Rules
Ram or Die is a set of free wargames rules (and paper figures!) for refighting the Battle of Salamis.