GIFMaker for Mac - GIFMaker – Created a GIF from a video or Images is the easiest way to create an animated GIF on your Mac.
Imgur's Video to GIF - Make a GIF from hundreds of video sites
Giphy - Search all the gifs and make your own animated gif
GIPHY Says - Turn your words into animated GIFs!
GifRun - GifRun provides easiest way to find and create animated GIFs from YouTube, Video, Images or Vine...
Gifify - Convert any video file to an optimized animated GIF