Advanced WMA Workshop 

Pretty useful tool with handy interface, allowing you to convert WAV, MP3, OGG, CD files to WMA 9 format, convert WMA 9 to MP3 and OGG, decode WMA,MP3,OGG files to WAV PCM. Also include built-in batch conversion mode and ID3v2 Tags editor.
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Audio Conversion Wizard 

This tool with easy step-by-step interface helps you to convert audio files of MP3, WMA 9, OGG and WAV PCM formats from one to another with ID3v2 copying and creation. Single mode for one-file conversion and Batch mode for converting several files.
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All To MP3 Converter 

If you want to convert your WMA, OGG, FLAC or WAV files to MP3 format, this program is exactly what you need. You can start conversion directly from Explorer by right-clicking on selected files and selecting "Convert to MP3" from context menu.
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