www.cgs.synth.net/, The homepage of Ken Stone and his modular synthesizer, and the obscure named modules that he has made. You can also buy PCB's for many of his modules on this site.
from the site:
What is this page about, you may ask.
It is a collection of notes, circuit diagrams and stories about the creation of my modular synthesizer, the "Catgirl Synth" as it has been dubbed by others. This synthesizer is mostly analog, and is based on the 1 volt per octave standards set by Moog.