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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.
Absolute Audio Converter - Absolute Audio Converter is an award-winning audio converting software.
OnlineVideoConverter.com - OnlineVideoConverter.
Kingshiper MP3 Converter for Mac - Kingshiper MP3 Converter for Mac is the best audio converting software that can convert audio/video files to MP3, WAV, M4A, AAC, WMV, FLAC, and other formats at a fast speed.
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.