Giphy Chrome Extension - Respond to emails, tweets & more w/ GIFs in a jiffy
GifJif - Turn GIFs into masterpieces.
PopKey for Desktop - Quickly share ridiculous GIFs from Mac or Windows
Giphy - Search all the gifs and make your own animated gif
All the GIFs - Search all the GIFs right from your Mac
GifLab - The easiest way to create GIFs on your iOS device