Pandyman Games offers Queen’s Quest, a set of free wargames rules advertised as a “2d6 game using no factions.”
Wyrmworld has a well-thought out and complete set of rules for using dragons in Games Workshop’s Lord of the Rings Strategy Battle game.
Fast and Easy Fantasy Wargaming is a set of pay-what-you-want rules for fighting 28mm fantasy battles.
Here’s a high resolution pdf file with the stats from all Heroquest figures through Wave 6. Printed out, it would make a handy reference sheet.
Seventh Spell is a set of free wargames rules for fantasy skirmish games.