Final Round is a set of free wargames rules for WWII skirmishes.
World War II
Fortress of War – Russian Movie
Fortress of War is a Russian production about the 1941 defense of the Brest Fortress against the invading German Army. It is subtitled.
WWI and WWII Naval Rules
Steve Burt offers a set of free wargames rules for WWI and WWII Naval combat.
1943 World War II Rules
From War Times Journal, 1943 is a set of free wargames rules for battalion level combat in World War II.
WW2 Rules For Brigade Level Games
David Wareham offers a set of WW2 Rules For Brigade Level Games