Fantasy is a large category, and there are many sites that have free armor or scenes.  Is there a particular scene type (Jousting Field, Throne Room, Battle Field, etc.) or character (M3, V4, Apollo, Kururu, Kiki, P4 Horse) that needs armor? 
I ask because we could end up with dozens of links being listed here, with none of them leading to exactly what you want.  A more specific description of what you want may even encourage someone to create it.  An example would be a shiny steel English armor for P4NM.  This would come in handy if you wanted to do a knight in shiny armor rescuing a damsel in distress, or fighting a dragon.
A long time ago I looked for that shiny armor, and never found it.  I no longer even remember what I wanted it for.  Since Daz gave away the Mil Dragon LE, I just may look again. 
Of course, if you are just looking for a list of all web sites that have fantasy stuff, ignore everything I just said.
                                                        -David