Imgur's Video to GIF - Make a GIF from hundreds of video sites
Vine Camera - Vine Camera is one of the best video editing application that allows you to make 6-second looping videos and post it directly to Twitter, Facebook, Instagram and all the other social platforms.
GIFMaker for Mac - GIFMaker – Created a GIF from a video or Images is the easiest way to create an animated GIF on your Mac.
Giphy For Gmail - Add the power of GIFs to your email
GifRun - GifRun provides easiest way to find and create animated GIFs from YouTube, Video, Images or Vine...
Coub - Coub is an app that features GIFs, but the GIFs that you select and send to other people have sounds.