The World of Darken
Nomads are a sub-race of Humans. The only real difference is their affinity for horses. The Nomad culture is based entirely around the vast herds of horses that they follow all over the steppes. They have even developed an empathy with horses that allows them to become master horsemen beyond that of other races.
Nomad characters must use their bonus feat to purchase a horse-related feat. One of their beginning skills must be ride.