Double Kick
A Double Kick deck has a Kicktail on both ends of the board and are usually symmetrical in shape. The main advantage of a Double Kick deck is that you don't have to worry about where the nose and tail is and can treat your tricks the same regardless of which way the deck is pointing. One of the only cases where this would matter is if you have your trucks tuned differently. Some people like to have their front truck looser than the back.
For a list of Double Kick decks see: Double Kick Decks
A good example of a Double Kick is the MODE "Postcard" Freestyle Deck.