Plaberpu is java clone of winamp, that comes with an open architecture based on plugins.
Plarpebu, plays mp3, ogg, midi, kar, mp3+cdg files on any architecture (Windows, Linux, Mac).
Plugins for midi karaoke support and mp3+cdg karaoke support are included. Nice point : Plaperbu is the only free karaoke player that supports the two most popular karaoke formats (.kar and mp3+cdg), and the only one that runs under Mac OS X and Linux.
Plarpebu should also work under Solaris and Mac OS 9 but has not been tested on these systems.