The World Of Gainar is a massive work — a complete RPG system set in a post-apocalypse fantasy world. This is no Gamma World, however. From my reading, it seems to be more of a traditional fantasy — with dwarves and elves (fey), swords and shields, but also with gunpowder and steam tech. For those who just want the background, there’s a stripped down version that’s just the world book.
The Miniature Wargaming Editor
Panzer Gruppe WWII Rules
Panzer Gruppe is a set of free wargames rules for corps/army sized battles in World War II.
I Shall Call You My Lord Rules
I Shall Call You My Lord is a set of free wargames rules for the Wars of the Roses
Battle of Chickamauga Scenario for Fire and Fury
Legion Wargames has a Fire and Fury Scenario for Chickamauga.
RKAA Brigade Commander Rules
RKAA Brigade Commander is a set of free wargames rules for brigade sized encounters in World War II on the Eastern Front.