I grew up reading The General, Avalon Hill’s monthly magazine featuring its games. You can find an archive of all of the original issues of The General at the link.
Table Air Combat is a pay-what-you-want, print-and-play game of WWII air combat. All you need are the prints and some six sided dice.
Paraguay is a free print-and-play wargame about the 1864 war involving Brazil, Uruguay, Paraguay and Argentina. It’s designed for 2 – 4 players.
Clash On The Fringe is a set of pay-what-you-want rules for military space adventure. They’re designed for use with whatever figures you have.
Historia Romana is a free print and play game set in the Roman Empire. Scenarios Include:
– The Rise of Sulla, 85 BC
– The Third Mithridatic War, 74 BC
– Caesar Vs Pompey, 50 BC
– The Year of the Four Emperors, 69 AD
– The Crisis of the Third Century, 260 AD
– The Imperial Restoration, 268 AD
– Alaric at the gates, 407 AD
– The Scourge of God, 451 AD
– Heraclius and the Last Persian War, 622 AD