ImprovedTube - Allows you to improve and enhance Youtube visually or enable dozens of new features permanently or...
2conv.com - 2conv.com is a simple yet powerful online video converter and downloader that allows you to download any YouTube videos in Mp3 quickly.
Magic Actions for YouTube - Magic Actions is an extension that changes the way you’ll watch videos on YouTube.
KlickAud - Klickaud is a free web-based application to online download SoundCloud track, music, songs in MP3 formats.
Iridium by ParticleCore - Iridium is an extension built to improve the user experience on the new YouTube Material layout.
OnlineVideoConverter.com - OnlineVideoConverter.