4k Video Downloader - 4K Video Downloader is a software program that helps people download video files from sites such as Facebook, YouTube and Dailymotion.
Video DownloadHelper - Browser extension to download videos from the Web
yt2mp3.org - Free online YouTube to MP3 Converter
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
DVDVideoSoft YouTube to MP3 Converter - Best YouTube to MP3 Converter of 2019. Any format, any quality, ad-free. Easy YouTube playlists downloads. Loved by users since 2006.
ClipGrab - A friendly downloader for YouTube and other sites