Fast and Easy Fantasy Wargaming is a set of pay-what-you-want rules for fighting 28mm fantasy battles.
Seventh Spell is a set of free wargames rules for fantasy skirmish games.
Soulsteader is a Heroquest variant that
that can be played with any number of people. This game allows the process of building the landscape to be an intrinsic part of gameplay, and not merely a task performed prior to battle. It is intended as a better way to play HeroScape, one which makes every aspect of the product part of the gameplay itself.
The game centers around tile constructions called Wellsprings, control o
Dungeoneering dot Net has a nice selection of printable terrain tiles ostensibly for use with the Dungeons and Dragons miniatures game, but which would also work with any number of dungeon crawl games — of which there are many free ones available on this site.
Quests of Heroscape adds a new element to the basic Heroscape game. In it, a victory is achieved by completing a series of random quests. The rules include some professionally done quest cards.