Fantasy Rules! - by ChipCo
Hordes of The Things - by WRG
Mighty Armies - by Rebel Miniatures
Command & Colors: Ancients - by GMT Games
Impetus/Basic Impetus - by Dadi&Piombo
There is an excellent review of many of these games at Boromir & Kermit - link.
I'm still leaning towards Impetus. One of the stalling points for the rules are the markers needed. I saw some great ideas for markers at Ashton's Mordheim blog - link. I am thinking that a shield on a small base, with a subdued number painted on, would work for a casualty marker. Crossed swords might be good for a Disorder marker. Impetus (as opposed to Basic Impetus) also uses a marker for Opportunity, where a unit can react to the opposition easier.