Gifs.com - Easily turn videos into a GIF
GifJif - Turn GIFs into masterpieces.
Piktogramic - Guess the game's chosen subject on your own or with friends!
Giphy - Search all the gifs and make your own animated gif
Crumbles - Crumbles are like reaction GIFs with a way bigger vocabulary
GifLab - The easiest way to create GIFs on your iOS device