Aquanautica Imperialis is a set of free wargames rules for naval battles in the Warhammer 40K universe. The underwater rules are found here.
Games Workshop
Warhammer Special Characters Fan Supplement
Warhammer Special Characters is a high quality fan supplement for Warhammer Fantasy Battles.
Warhammer Fantasy Battle Hobgoblins Army Book
As it turns out, a Hobgoblin was the very first fantasy figure I painted, so they’ve always had a special place in my heart. Here’s a fan-created Hobgoblins Army book for Warhammer Fantasy Battles. As with the other int his series, its very well done.
Dogs of War Supplement for Warhammer Fantasy
Here’s an excellent, unofficial, fan-created Warhammer Fantasy supplement called “Dogs of War.” Now you can add mercenaries to your regiments.
Mighty DBX Empires
Mighty DBX Empires is a DBA variant for Games Workshop’s Might Empires rules.