One Piece Omake

One Piece Omake are short manga chapters originally published in the One Piece Log Books & Databooks. So far, five of them ("Report Time" through to "Monster Time") have been animated and aired with a set of five "Recap" episodes aired during the Enies Lobby arc. The first two Omake shorts Orchestra of the Sea and 4-Panel Comic Strips and all those following Monster Time haven't been adapted into the anime yet. There have been 13 in total.

01 Orchestra of the Sea 02 4-Panel Comic Strips 03 Report Time 04 Obahan Time 05 Jingi-nai Time 06 Chopper Man 07 Monster Time 08 Space Time 09 Red-Hair of Class 3 - Sea Time 10 Marchen Time 11 Family Time 12 Ed Sullivan Show 13 Detective Loomes
 * Characters: Straw Hat Crew.
 * Characters: Straw Hat Crew and Vivi.
 * Characters: Straw Hat crew and Tsubaki.
 * Characters: Luffyzaki, Zoroyama, Chopamori, Sanjida, Usokawa, Namijima and Robino.
 * Characters: Don Luffione, Don Zoroscia, Don Sanjino, Usotuya, Choparini, Namimore and Robita.
 * Characters: Dr. Usodabada, Chopperman, Namifia, Sanjirops, Giant Luffy Bomber, Zorogilla and Robiflowan.
 * Characters: Rodusa, Ussopaka, Lugyao, Chopaken, Stranami, Saneara and Zoromilk.
 * Characters: Robiya Hime, Luffytaro, Sanvade, Zorodadener, Usoshakeen, Frangashahn, Choppasmith and Namitanian.
 * Characters: Red Hair Sensei, Franory, Chopahiko, Zoromichi, Namie, Sansuke, Usoya, Robika and Luffyshirou.
 * Characters: Lubuu, Chobuu, Brobuu, Fragarr, Zoro White, Usochi, Queen Nami, Prince Robipri and Sanchuu
 * Characters: Robina Mugiwara, Buruzou Mugiwara, Zorohei Mugiwara, Usoe Mugiwara, Fraichiro Mugiwara, Sanjiro Mugiwara, Namimi Mugiwara, Luffiro Mugiwara and Chopa Mugiwara
 * Characters: Choppari Hanzou, Nico Perry, Gomukawa Lufinobi, Furamoto Musashi, Usokawa Goemon, Princess Namimitsu, Sannemon, Zorosaku and Broodayuu
 * Characters: Detective Loomes, Doctor Usotson, Brongie, Namiron Stone, Nakamura Hanzorou, Robie, Cholyde, Golco Sanjeen, and Frack the Ripper.