Savage Survive Skirmish is a set of free wargames rules for games set in a post apocalyptic winter.
A Coronation of Kings – Free Fantasy Ebook
A Coronation of Kings is a free kindle book from Amazon. From the description:
With his world in ashes Tristan Listar is left fighting for his life. As the island of Valaar slips beneath the tides of tyranny, Tristan must save himself… and his people.
Tyrants will rise, armies will assemble, and the winds of magic stir ominously. When the dust settles and the age of uncertainty is at an end, who will wear the Crown of Kings?
East Front Sniper Game
In East Front Sniper, each player acts as a World War II Soviet Sniper, competing to rack up the most kills.
Creating A Fantasy Sandbox
Rob Conely of A Bat In The Attic blog has written a document on making a Fantasy Sandbox.
Warhammer World War 2
Warhammer has been adapted to every period I can think of. Here’s a version called Warhammer Panzer Battles