VidToMP3.com - VidToMP3.
OnlineVideoConverter.com - OnlineVideoConverter.
ClipConverter.cc - ClipConverter.
Ytmp3.cc - By using our converter you can easily convert YouTube videos to mp3 (audio) or mp4 (video) files and download them for free - this service works for computers, tablets and mobile devices.
2conv.com - 2conv.com is a simple yet powerful online video converter and downloader that allows you to download any YouTube videos in Mp3 quickly.
MP3 Converter - Mp3 Converter is a free to use as YouTube to MP3 converter that allows you to convert and download YouTube to MP3, MP4, F4V and 3GP formats.