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
fantasy
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.
Frostgrave Rules Free From Osprey
No April Fools Here: Osprey is offering the core rules for its popular Frostgrave rules for free this week.