Synth Fox Custom Stuff
I love websites like this, definitely check it out. Website
There's lots of great modules here with long and detailed writeups. Here's a few that stick out to me after clicking on a few random ones.
After taking all these requests from me to me into account, i came up with a voltage controlled clock core that has an absolutely insane range, from ticking once every few minutes to literally going into sound range.
VC 4 To 1 Selector is another useful and universal utility module. Based on the Signal Switch by Rene Schmitz, it is a device that selects one of the four input signals and reproduces it on its single output jack. It covers the entire modular signal voltage range and has super low distortion, making it suitable for both CV and audio usage - and, naturally, binary logic signals, too.
Punk SVF is my first successful design of a fully solid state filter (no vactrols involved). It got its name for not requiring any special parts whatsoever, being relatively easy to build, and sounding raspy, abrasive, and at times even unruly. It's a cool filter with loads of character and sweet spots! Topologically, this is an unorthodox implementation of an otherwise classic state-variable filter.
This very useful vactrol-based module can crossfade between things. Both CV signals and audio rate signals can be crossfaded with it.