Northern Crown Adventures: d20 rpg based on a colonial America with fantasy elements. Instead of the thirteen colonies, there are countries formed from colonies of the "Uropan" powers. So, instead of North and South Carolina, there is Carolinga, ruled by the deposed King Charles. Instead of Virginia, there is Sophia, a country ruled by democracy and a bastion of the Enlightenment. There are native american tribes (the Cherokee, Ottawa, Iroquois, for example) who are great magic users and through their power have managed to check the advance of the Uropan powers to the east of the Appalachian mountains. Florida is controlled by the Espaniards, and the Caribbean has a mish mash of different powers controlling the islands.
The core classes have been tweeked: instead of a fighter you can play a soldier, which is similar exept that you pick infantry or dragoon or artillerist, and you get different abilities from those choices.
Nyambe is a d20 Africa-like setting written several years before NC and not affiliated with it. But NC incorporated the setting into its "world" and so you have many of the "races" available from the Nyambe setting who were brought to the new world by slavery.
I could go on and on with the love, but check out
www.atlas-games.com and look up both settings.