Plane9 is a 3d visualizer where you never have to settle for just one view ever again. It features over 250 predefined scenes to choose from. But it doesn't end there since the scenes can be combined with one another to form a near endless supply of new views to experience. 37 transition are used to form a continous experience when moving from scene to scene.
The visualizer can be used either as a winamp plugin, a Windows Media Player plugin, screensaver or a oculus rift VR visualizer. In it's standalone modes it is sound sensitive and reacts to what your currently listening to, be it from spotify, iTunes or any another sound source, it can even react to what you record from a microphone or other input.
To get a feel for what it can do check out the music video.