PocketTube - Group YouTube subscriptions into YouTube folder. Video Deck for Youtube. Mark as watched videos. Filter YouTube video. Youtube mode
YouTube - Our mission is to give everyone a voice and show them the world.
YouTube Vanced - Vanced is a modded version of YouTube with many features such as adblocking and background playback
NewPipe - NewPipe is a lightweight YouTube front-end for Android.
PlamasTube - Video & Movies
Better Subscriptions for YouTube™ - This extension for Firefox and Chrome aims to make navigating YouTube's subscription grid easier by allowing users to hide watched videos