The Realm of Chaos Blog has a post on an old school (1988) Warhammer Fantasy Skirmish game
Rules: Games Workshop
Fighting Fantasy Mass Battle Rules From 1986
Fighting Fantasy Blog has published a set of “Fighting Fantasy Mass Battle” rules from a 1986 issue of Warlock magazine. Ahhh … such Old School Goodness.
Killzone Survival Warhammer 40 Skirmish Rules
Killzone Survival is a set of fan created rules for skirmishes in the Warhammer 40K Universe.
Aquanautica Imperialis Submarine Rules
Aquanautica Imperialis is a set of free wargames rules for naval battles in the Warhammer 40K universe. The underwater rules are found here.
In The Emperor’s Name v. 3.0
In The Emperor’s Name is a set of free wargames rules for skirmish games in the Warhammer 40K Universe. Theyr’e not up to version 3.0.