Imgur's Video to GIF - Make a GIF from hundreds of video sites
PopKey for Desktop - Quickly share ridiculous GIFs from Mac or Windows
GIFMaker for Mac - GIFMaker – Created a GIF from a video or Images is the easiest way to create an animated GIF on your Mac.
Vlipsy - Easily add your favorite video clips to any conversation.
GifRun - GifRun provides easiest way to find and create animated GIFs from YouTube, Video, Images or Vine...
Giphy For Gmail - Add the power of GIFs to your email