Comic Book Plus has a collection of “Atomic Comics” from the late 1940s through the 1950s that attempted to capitalize on the public’s fascination with atomic energy.
Dungeons and Dragons Paper Model Buildings
Many moons ago, TSR / Wizards of the Coast released a series of paper buildings for use in D&D games. They’re now available free for the downloading. Any medieval / fantasy wargamer will find these useful. I think they’ve really stood the test of time.
Liberated Hordes – South American Wars of Liberation Rules
Liberated Hordes is a set of free wargames rules for the South American Wars of Liberation. They rules are an amendment to the Hordes of the Things rules (HOTT).
Inquisitor Rules 40k Universe
Inquisitor was game produced by Games Workshop set in the Warhammer 40K Universe. Curiously, it used 54mm figures.
The game is out of print, but a rules archive is at the link.
Texturing Gaming Board With Spackle
This video shows a nice technique for texturing game boards with filler (spackle).