SD characters : here are small animated gifs you can use as avatars on some forums, thanks to Ruthay for these findings.
Anime : taken out of anime scenes: Easily done, they're still nice.
Manga : Manga: show extracts of the manga, so some may content spoilers, beware. (Thank to BlitzRonin)
If you want to see your gifs displayed here, please send them to [email protected]