SlidesPro - Google Slides add-on w/ shortcuts, YT videos & more
ezgif.com - Ezgif.com is simple online gif maker and toolset for basic animated gif editing.
Tall Tweets - Tall Tweets, now with support for 280 characters
Gifsicle - Gifsicle is a powerful, simple command line tool for creating, editing, and optimizing animated GIFs.
TalkingDeck - With TalkingDeck you can create instructional videos from Google Slides presented by our animated characters.
Instagiffer - Create GIFs from anything!