Milkdrop is still alive! Here is an epic collection of the best presets.
https://thefulldomeblog.com/2020/02/21/nestdrop-presets-coll...
Sadly the NestDrop tool in the article you linked is Windows only, and proprietary.
But Milkdrop is alive in open source cross-platform too. https://github.com/projectM-visualizer/projectm