Coub - Coub is an app that features GIFs, but the GIFs that you select and send to other people have sounds.

Img.vision - Image hosting & video hosting for eCommerce sellers

Giphy - Search all the gifs and make your own animated gif

BeeIMG - BeeIMG is a simple, fast, easy image sharing solution created to fill up your image sharing needs.

Gfycat - Gfycat is gif hosting, with three unique advantages: Speed - Average is 8 times faster.

ImageVenue - ImageVenue is a great online hosting service that allows uploading pictures for showing creative works with a simple-to-use technique.