Scorched Parchments is a fantasy supplement for the Wars of the Roses rules Torn Liveries. Both sets of free wargames rules are available at the link.
fantasy
Peep Wars Wargames Rules For Marshmallow Candies
What do you do with all of those leftover Easter candies like marshmallow peeps and jelly beans? Play a wargame, of course. Invisible City Productions has rules for just such a scenario, called Peep War
Vanguard Fantasy Rules
Mantic offers a free pdf of their Vanguard Fantasy Rules
Rules By Ral
The Mainly 28s site has the original Rules By Ral fantasy rules sets.
Axe Age Rules
Axe Age is a set of free wargames rules for miniature wargames in a dark fantasy setting.