Media player for Wii. It has a nice interface and is skinnable. It plays mp3, ogg, flac and other formats but does not work with wma. As of 0.25, it now supports m4a and mp4!

DragonMedia Player
Source- wiibrew

CHANGELOG

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-Added support for AAC, M4A and MP4 file format
-Songs now continue to play from old directory when browsing through directories
-Fixed a crash bug with modules that don't load properly
-Fixed an issue where sometimes it would take several seconds to play the next song