Drop to GIF - Super simple movie to GIF conversion
Giphy - Search all the gifs and make your own animated gif
GIFMaker for Mac - GIFMaker – Created a GIF from a video or Images is the easiest way to create an animated GIF on your Mac.
Buffer - Buffer makes it super easy to share any page you're reading. Keep your Buffer topped up and we automagically share them for you through the day.
Crumbles - Crumbles are like reaction GIFs with a way bigger vocabulary
CONV. - Convert YouTube video to MP3, GIF or MP4