Original "chibi" styled animations of Imouto sae Ireba Ii. posted on the anime's official Twitter channel. Also included on the BD/DVD releases.
Up to EP 12KatanagatariAnime
Up to EP 1Explorer Woman RayAnime
Up to EP 9RecAnime
Up to EP 9Kuroko's Basketball SpecialsAnime
Up to EP 24Special AAnime
Up to EP 1Carnival Phantasm: HibiChika SpecialAnime
Up to EP 79Tomorrow's JoeAnime
Up to EP 13Lord Marksman and VanadisAnime
Up to EP 1Kick-HeartAnime
Up to EP 1Major Movie: Yuujou no Winning ShotAnime
Up to EP 49Mobile Suit Gundam AGEAnime
Up to EP 12Last Period: The Journey to the End of the DespairAnime