Greasy Fork is available in English.
YouTube™ MP3 Downloader v4.2 (Relaunched) 🚀💯 - YTMP3x.com (NO ADS & NEW LAYOUT FOR YT! 🚫🤩)
This script adds a download button, a faster way to download audio from YouTube and with guaranteed quality. This site is very simple, fast and effective to download! Best of all!