Gifsicle - Gifsicle is a powerful, simple command line tool for creating, editing, and optimizing animated GIFs.
ezgif.com - Ezgif.com is simple online gif maker and toolset for basic animated gif editing.
Instagiffer - Create GIFs from anything!
APNG to GIF - Convert APNG animations into animated GIF format.
Gifox - Delightful GIF Recording and Sharing App for macOS
GiftedMotion - Easy to use GIF animator