Audacious is, an advanced, open source audio player. A descendant of XMMS, Audacious plays your music how you want it, without stealing away your computer’s resources from other tasks and is considerably more powerful than GStreamer.
Rhythmbox is an integrated music management application, originally inspired by Apple's iTunes. It is free software, designed to work well under the GNOME Desktop, and based on the powerful GStreamer media framework.
gmusicbrowser : An open-source jukebox for large collections of mp3/ogg/flac/mpc files, written in perl.
Amarok is the music player for Linux and Unix with an intuitive interface. Amarok makes playing the music you love easier than ever before - and looks good doing it.