FreeTube - FreeTube is an open source desktop YouTube player built with privacy in mind.
ImTOO Download YouTube Video - ImTOO Download YouTube Video is a free YouTube video downloader software!
NewPipe - NewPipe is a lightweight YouTube front-end for Android.
4K Download Online - Download music from YouTube to Android, SoundCloud to Android, Facebook to Android, Vimeo to Android, from browser to device or to desktop directly.
Minitube - Minitube is a YouTube desktop application.
GetGo Download Manager - GetGo Download Manager is the best free internet download manager designed for the new generation of web sites (web 2.0)