ezgif.com - Ezgif.com is simple online gif maker and toolset for basic animated gif editing.
Enhancer for YouTube - Tons of features to improve your user experience on YouTube™!
Gifox - Delightful GIF Recording and Sharing App for macOS
ImprovedTube - Allows you to improve and enhance Youtube visually or enable dozens of new features permanently or...
Instagiffer - Create GIFs from anything!
Iridium by ParticleCore - Iridium is an extension built to improve the user experience on the new YouTube Material layout.