Wyrmworld has a well-thought out and complete set of rules for using dragons in Games Workshop’s Lord of the Rings Strategy Battle game.
Glenn McClune has kindly permitted me to host the files for his latest game, DragonDuels. Glenn says that Dragon Duels:
is a game where you take two toy dragons, like Megabloks Dragons or MacFarlanes Dragons , and fly them around and duke it out. The game is easily played and allows you to custom build your own dragon, by making new special abilities you can keep expanding the game. If people mail in their own specials than I will pull them all together and add to the game, so if you like it, feel free to be creative and come up with your own powers.
He’s also opened a blog on the games here.
Given the popularity of Smaug, the inclusion of Dragons in the Lord of the Rings Strategy Battle Game is a natural.
Drake: The Dragon Wargame is a set of free wargames rules for fantasy wargames focusing on Dragon leaders with their servants and lieutenants.
Dragon Fight is a set of free wargames rules for aerial dragon combat.