MP3

iTunes
Create MP3 libraries, burn CDs, and download music to your iPod and iPhone.
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You Control: Tunes
Get a complete control over iTunes from the Mac OS X menu bar.
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iPodRip
Transfer music to and from your iPod with this utility.
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M4P to MP3 Converter for Mac
Convert M4P files into MP3 format.
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WhiteCap
Try this music visualization plug-in for MP3 players that can operate as a standalone screensaver.
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Switch Audio Converter for Mac
Convert audio files into MP3 or WAV format.
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Mojo
Browse, download, and share music with other Maestro users on your network.
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Jaikoz for OSX
Organize and manage your music collection.
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CoverScout
Get cover art for all your music and movies in iTunes with this program.
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Music Man
Rip, convert, and burn audio files on CDs.
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