There are myriad groups and factions of all sizes around Thedas, and the Inquisition dealt with many of them during its time.  Varying from small secret societies to entire races of people, our relationships with all of them impacted our efforts in some way.  Trusted allies bolstered our strength and created a united front against the forces of Corypheus, while villainous enemies did everything in their power to hobble us and accelerate the end of the world as we know it.  And some of them just wanted nothing to do with us, but since I talk about them in the book, they get a spot here.