Creative MediaSource is a Multimedia Suite distributed with Soundblaster and Zen products from Creative with main target to make it easier to organize, play, convert and transfer music from your computer or portable mutimedia player; it even includes an online store to compete with iTunes.
It's compatible with Microsoft Windows XP and Vista however there are some differences between them, the most notable is the lack of EAX Console (surround effects) for Vista, due to hardware driver limitation.
MediaSource organizer allows you to sort music by genre, artist, album, year, and create 'usual' and 'smart' playlist, the last one has some defaults filters, for example, ones sorting music by tempo (speed), rating (vista own rating) new or old favorites, etc.
MediaSource audio converter will let you select and convert Mp3, wave or wma files.
Last but not least, MediaSource player will let you enjoy your music with some nice options such as crossfading between tracks, volume management and audio clean up.