FreeGrabApp YouTube to MP3 Converter - Application for converting YouTube videos to MP3.
Savemp3 - Savemp3 is an online video converter and downloader that supports videos from YouTube, Facebook, Instagram, Soundcloud music, Twitter, Reddit, Vimeo, and Dailymotion.
MediaHuman YouTube to MP3 Converter - Extracts MP3 audio from YouTube, Vimeo, Dailymotion, Mixcloud, Bandcamp, SoundCloud and many others. Available for macOS, Windows and Ubuntu/Linux. FREE!
MiniTool uTube Downloader - Download 4K YouTube videos
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.
Xilisoft Video Converter - Xilisoft Video Converter is easy, fast, reliable, and loaded with features.