Ultimate Frisbee Organization
Double Disc Court (DDC) is an intense team disc sport that tests a players touch, power and precision to the limits. DDC is played between two teams of two with two light discs and two square "courts" placed 17 meters apart. Here is a web page that describes the rules in detail and gives directions on how to set up a DDC court.
Here are some pictures of DDC in play, along with short captions explaining the action.