How to download audio from Youtube in Ubuntu | Ubunlog
YouTube MP3 Downloader for PC (Free & Online)
YouTube to MP3 Downloader – Get this Extension for 🦊 Firefox (eu)
how to download from youtube and convert to mp3, YouTube to Converter Online: How to Download Music from on Android Mobile, iPhone, Laptop - minifabriek.com
Advanced Youtube to MP3 converter extension - Opera add-ons