A fanlisting is a place for all fans of a particular show, movie, actor/actress, singer, etc. to come together and build the biggest listing of people from all around the world who are fans of that subject.
(from TheFanlistings.org)

This particular fanlisting is for fans of the GNW-003 Gundam Throne Drei from the anime series Mobile Suit Gundam 00. If you're one of them, feel free to join!