Project M (Milkdrop for Mac and Linux)
Milkdrop has long been thought of as the best music visualizer on windows, and until now has never been available to mac or linux users. Enter Project M.
"projectM is basically a re-implementation of Milkdrop under Linux/SDL/OpenGL/XMMS. projectM already does some things Milkdrop does not (like infinite custom shapes/waves). projectM uses no platform-specific code outside of the xmms interface."
Don't rush to grab it yet though, the mac version has not been released yet. According to their site it will be available soon (a couple days most likely).
-CGP fo Life-