This papercraft is the Joker, a supervillain and the archenemy of Batman, in The Dark Knight, the Joker is depicted as a maniacal criminal mastermind who terrorizes Gotham City and whose goal is to create "a world without rules". The paper model created by wackywelsh. For more information of the Joker please click on: Batman: The Dark Knight – The Joker Free Paper Craft.
There are other Joker paper toys avaliable:
Batman – The Joker Free Paper Toy
Life Size Joker Style Mask Papercraft
BIT+ Batman: The Dark Knight – Joker Free Paper Toy
Batman Beyond: Return of the Joker – Joker Free Papercraft
Octopus Dei – Joker, Wolverine and SuperMan Free Paper Toys
You can download the papercraft template here: Batman: The Dark Knight - Joker Free Papercraft Download