Youtube Plus - Home of the extension YouTube Plus that allows you to experience more on YouTube - ParticleCore/Particle
CONV. - Convert YouTube video to MP3, GIF or MP4
You-Get - Command-line utility to download media contents from the web
Wibbitz - Watch video summaries of the news you want.
YouTubeDLD - World's most efficient YouTube downloader. No spam or ads.
GifRun - GifRun provides easiest way to find and create animated GIFs from YouTube, Video, Images or Vine...