Gifgasm - Create GIF slideshows using image search
GifJif - Turn GIFs into masterpieces.
Gifmock for Sketch - Create high-quality GIFs from layers in your Sketch files.
Giphy - Search all the gifs and make your own animated gif
Flashy - Email & SMS marketing automation platform
GifLab - The easiest way to create GIFs on your iOS device