The Alchemists' Quest
All the Races from the DnD material are available. For the most part they all intermingle with each other well. Each civilized race kind of favors certain terrain but you can find about any race about anywhere in the world. There are many tribes of orcs, goblins, kobolds, and other barbarian races but most would agree they take away from culture of the world rather than contribute any of their own.
Other races exist but are much rarer. Not many have seen a Drow, Warforged or Deva but they exist out there somewhere.