[blackeyeblitzar]

Winamp also had visualizations. It seems that none of the modern players have that.

[spectre3d]

VLC has 5-6 audio visualizers built-in that you can make fullscreen.

Not sure about anything else being discussed (Audacious, etc) but im guessing there mist be visualizer plugins for foobar.

[anthk]

Audacious + ProjectM.