Risky Settlers of Catan

Risky Settlers of Catan is a Settlers-Risk mash up. The author writes:

It’s basic Catan rules plus armies! With your soldiers that you produce based on number of settlements/cities, hexes controlled, and intersections controlled, you can: -Control hexes for either resource or troop production bonuses -block opponents’ development and expansion -attack and seize opponents’ hexes and settlements.

Tom’s Ancient Warfare Rules

Tom’s Ancient Warfare rules are a set of free wargames rules designed to be played with — of all things — Risk pieces. The author notes that the bases may need to be larger if you use historical miniatures.