TubeLister - Generate a YouTube playlist from your opened tabs.
YouTube Trending - Making it easier to find viral videos
OrganizeTube - Create video playlists from Youtube, Vimeo and other sources
Music Pro - Stream YouTube music
Learnamic - Free and paid K-12 learning resources from hundreds of providers, including educational apps, YouTube videos, online classes, printable worksheets, and more.
You No Cards - Hide YouTube end cards and channel logo with a single click