JuK

JuK is a free software audio player for KDE, part of the kdemultimedia package. JuK supports collections of MP3, Ogg Vorbis, and FLAC audio files.

JuK was started by Scott Wheeler in 2000, and was originally called QTagger — however, it was not until 2002 that the application was moved into KDE CVS, where it has grown into a mature audio application. It was first officially part of KDE in KDE 3.2.

http://developer.kde.org/~wheeler/juk.html