Yout - YouTube to Mp3 Converter
Savemp3.cc - An online free YouTube converter which allows you to convert videos and audios to MP4, MP3, M4A from YouTube, Facebook, Instagram, MixCloud, Dailymotion, VEVO, bilibili, niconico, etc. Supports HD MP4, 720p, 1080p video and 320kbps MP3.
Softorino YouTube Converter - Download YouTube video & audio. Watch and listen offline
YTMP3.co.com - YTMP3.co.com is a 100% free multi-format audio and video downloader that lets you convert video and audio from most social media platforms. No annoying ads.
You-Get - Command-line utility to download media contents from the web
Online video converter - Video conversion tool to convert a video link or file to various formats.