The Den Den Mushi are snails that are used for communication or visual aid in the anime/manga One Piece. Model by nandablank.
One Piece - Den Den Mushi Papercraft via Ninjatoes

An official papercraft of the Thousand Sunny ship from the popular anime/manga One Piece. Model by Toei.
One Piece - Official Thousand Sunny Papercraft via Ninjatoes

It's been a very long time since we've last seen a Luffy papercraft. Most of the ones posted here are no longer available. A big thanks to Corbak for this model!
One Piece - Monkey D Luffy Papercraft

It seems like ages since we've last seen a Monkey Luffy papercraft from the anime/manga OnePiece. This simple version was made by Paperroni.
One Piece - SD Monkey D Luffy Papercraft

Aokiji, whose real name is Kuzan in the anime One Piece is one of the three Marine Admiralsand is considered as one of the most powerful characters in the series.
One Piece - Aokiji Papercraft Cubee

Iron Pirate "Franky Shogun" (鉄の海賊（アイアンパイレーツ）「フランキー将軍」 Aian Pairētsu "Furankī Shōgun"?, literally meaning "Iron Pirate General Franky") is the newest addition to the Battle Franky line, numbered BF 38-wikia
One Piece - Iron Pirate Franky Shogun Papercraft

The Thousand Sunny is the second ship of the Straw Hat Pirates lead by Monkey D Luffy after the Going Merry was destroyed.
One Piece - Thousand Sunny Ship Papercraft Part 1
One Piece - Thousand Sunny Ship Papercraft Part 2
One Piece - Thousand Sunny Ship Papercraft Part 3

Hannyabal is one of the characters who appeared in the anime/manga One Piece. He was initially introduced as the Vice Warden of Impel Down but later on becomes the Warden in charge.
One Piece - Hannyabal Papercraft

Pirate Empress Boa Hancock is the only female member of the Shichibukai in the anime One Piece. She is the Snake Princes of Amazon Lily and is in love with the anime's main character Monkey D. Luffy.

One Piece - Boa Hancock Papercraft

A bigger and more detailed model of Luffy's Going Merry ship. It measures about 40 cm long and is divided in three parts.

Going Merry Part 1

Going Merry Part 2

Going Merry Part 3

The Thousand Sunny is the second ship of the Straw Hat Pirates in the hit anime One Piece. It became their primary mode of transportation after the Going Merry was lost.

One Piece Thousand Sunny Papercraft

We don't get to see this everyday. Check out Spongebob dressed as Monkey D. Luffy of the anime One Piece and Patrick as Majin Buu of Dragon Ball Z.
Crossover Anime: Monkey D. Sponge & Buutrick

This is a follow-up to the previous post from the Taiwanese designer Odin. To get Chopper, send the completed Boss pic to Odin at odinsl@yahoo.com.tw. Remember, request for the 8 Zoo Keeper animals first and build them to get the boss. Then build the boss to get Chopper.
One Piece Papercraft: Chopper 2

Tony Tony Chopper from the One Piece anime is a 15-year-old doctor and the fifth to join Monkey D Luffy's "Straw Hat Pirates." He is a blue-nosed reindeer, who ate the Devil Fruit Human Human which enables him to converse with humans and animals alike.

One Piece Papercraft: Tony Tony Chopper

Here is a very cool papermodel of Monkey D Luffy from my favorite anime series One Piece. This model is very simple with only two pages of parts. You're gonna need those tweezers as there are very small parts included. I wish he'd also design the other characters like Chopper. If I'm not mistaken, this model will be available until May 11 only so hurry up and download!
One Piece