Final Round is a set of free wargames rules for World War II infantry combat games.
WWII
Final Combat Micro Melee
Final Combat Micro Melee is a set of free wargames rules that converts the Final Combat skirmish system for use with Micro Armor.
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.
Last Hussar’s World War II Rules
The Last Hussar blog has a set of free wargames rules for World War II. They’re a work in progress, so you’ll want to stop back by on a regular basis.