GIF Encode - Encode your movies into .gif files, and optionally upload to imgur.com.
ezgif.com - Ezgif.com is simple online gif maker and toolset for basic animated gif editing.
GifTuna - Quickly convert videos to gifs on Mac, Windows, and Linux
Instagiffer - Create GIFs from anything!
Gifs - Search through a library of hundreds of GIFs that you can send in your messages or that you can share to social media pages.
Gifox - Delightful GIF Recording and Sharing App for macOS