Domination - Domination is a game that is a bit like the well known board game of Risk.
ThumbZilla - Awesome thumb stomping and kicking action game.
Legends of Callasia - Unique blend real-time and turn-based elements in a Risk-like war game.
TripleA - TripleA is a free (under GPL) turn based strategy game based on Axis & Allies board game.
Warlight - Warzone is a customizable Risk-like strategy game where you compete with your friends to conquer the world.
World Conqueror 1945 - World Conqueror 1945 is a strategy game based on WWII (Super Risk).