Recently we were feeling nostalgic, and upon realizing that there wasn't a good way to pipe these visuals into more general-purpose VJ apps like VMDX, we decided to build something that did. Fortunately, this was pretty easy- in large part because we were able to make use of a nice open-source library called ' projectM', which is an OpenGL-based re-implementation of the class MilkDrop engine. For a lot of people, visualizers bundled with MP3 players were their first exposure to music visualization, and that's had an important and lasting influence on what we all do.
We've all been there: you're in the middle of a gig, and someone asks you if you can do something 'like the classic winamp / milkdrop / geiss visualizer thing'. Download ProjectMilkSyphon (v 1.0.1 – April 20, 2016) (requires Mac OS 10.9+)