VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Jajuk - Jajuk is software that organizes and plays music using Java.
foobar2000 - An advanced freeware audio player for the Windows platform.
Sayonara Player - Sayonara is a simple but nice audio player and holds a lot of features like a library, id3 tag...
Winamp - Winamp is a media player that allows users to play multiple-file formats, arrange media in a varied file-management system, and play unique media with AAC encoding.
GNOME Music - Music is the new GNOME music playing application.