This papercraft is the Going Merry, based on the anime / manga series "The One Piece", the ship paper model is designed by ninjatoes. The Going Merry was the first ship of the Straw Hat Pirates that they used as their main mode of transportation through the East Blue all the way to Water 7 where it was replaced by the Thousand Sunny. It is a caravel class ship designed by Merry and given by Kaya to the Straw Hats as a reward for saving her. Over time, the ship came to be loved by the crew as a home and as a friend, so much so that it literally took on a life of its own and became just as much a part of the crew as any of them. Unfortunately, the Going Merry took an inordinate amount of damage during its "lifetime", being blown up, impaled, and even sliced up multiple times. Eventually, the Going Merry could no longer continue and received a Viking funeral.
The Going Merry has a jib and a central steer rudder. The ship's armaments consisted of four cannons, one in the bow pointing forward, one in the stern, and two pointing to either side. They were rarely used, as the Straw Hat Pirates usually prefered to run away or engage in hand to hand combat. After the Arlong arc, the Going Merry gained three tangerine trees from Bell-mère's grove, a memento of Nami's home. As the series continued on, the ship received more and more damage and gained several metal patches to hold it together at places that could not be nailed back together, like Merry's figurehead and the mast, which was torn off several times. In the Skypiea arc, the body of the ship had wings and the sheep figurehead was dressed as a chicken
In volume 11 of the manga, Oda presented various schematics and explanations of each part of the ship. These included everything from Merry's figurehead to its kitchen.
In colorspreads and certain covers of the manga, it is shown that Going Merry's figurehead and most of its body is colored just brown. In the anime, it is more colorful.
In the manga, the Going Merry has been accumulating damage on it's voyage in the the Grand Line, with the most notable damage happening with the Straw Hat pirates encounter with Laboon, Wapol and later taking heavier damage while escaping from the marines during the Straw Hat's departure from Alabasta. In the anime this damage is more or less completely fixed, and they sustain most of it from their adventures in the Rainbow Mist.
You can download the One Piece paper craft here: The One Piece - Going Merry Ship Paper Model Free Download