GifTuna - Quickly convert videos to gifs on Mac, Windows, and Linux
ezgif.com - Ezgif.com is simple online gif maker and toolset for basic animated gif editing.
Gifsicle - Gifsicle is a powerful, simple command line tool for creating, editing, and optimizing animated GIFs.
Instagiffer - Create GIFs from anything!
Gifox - Delightful GIF Recording and Sharing App for macOS
Stacc - Tool for effectively converting videos to Gifs