Whamb is a Digital Audio Player developed only for Mac OS X. Whamb ensures quality and exceptional fidelity for a minimal consumption of processor resources, thanks to CoreAudio, according to the developer. Wahm features Skins (or appearence themes). Only a little knowledge of graphics is enough to create your own Skins. The quality of the Skins is obtained partly thanks to Quartz. Whamb already supports Audio CDs, MP3 and OGG VORBIS, but is intended to be extended. MP3 Audio streams are also supported.
More info here.