AllMusic - AllMusic.
Tubidy - Tubidy is a popular online platform that allows users to search, download, and stream videos and music from various sources, including YouTube.
MP3Juices - MP3Juices is a free mp3 search engine and tool that allows you to download unlimited mp3 files anywhere around the world.
YTmp3.net - Download your favorite YouTube videos as mp3 files without registration.
Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm
yt2mp3.org - Free online YouTube to MP3 Converter