Many years ago I was sent some pictures of Frank Zappa's, modified, late 1970's Big Muff™. The mods made to the pedal give it a very smooth, warm sound on the bass side but allows a little brightness on the high strings. 

They also reduce the gain of the pedal making it more of a low to medium overdrive/fuzz mix.
The pedal yields a full-bodied, smooth, low-end and sweet highs with a little bite on lead notes.
In 2016 I made a very limited run of the pedal and called it the Utility Muffin, named after Frank Zappa's recording studio, the Utility Muffin Research Kitchen. 

Review by delicious audio

Review by Premier Guitar

Product Page

Demo by Shwan Hatfield

Review by PedalPCB

Demo by Tim Cole

Utility Muffin

The Dire Wolf is a low to medium gain, drive pedal that has a ton of clarity and a sweet, transparent tone that sounds like it is part of your amp.

You can use the Dire Wolf for so many styles and also stack it with your favorite high-gain and fuzz pedal.

Review by reddit /guitarpedals

Demo by Toby & Davvy

Demo by Brett Kingman

Review by The Gear Page

Dire Wolf

The  Skinner Box is based on the original "Bud Box" Rat and made with the  obsolete, metal can version of  the LM308. The can version gives the  pedal a warmer tone.
The  Skinner box is very versatile. Not only does it give you huge, fat  distortion, it also gives you amazing over-driven tones when turning the  gain down around 12 o'clock.
The tone control has a good sweep from high to low and works well with the gain control.

Review by Pedal of the Day

Demo by Demos in the Dark

Demo by Pedal of the Day

Skinner Box

Can the Astoria give you full, smooth "Wall" tones? YES!
Does the Astoria have that deep, rich and slightly gritty rhythm tone heard on many of Gilmour's songs? YES!
Is the Astoria a copy of David Gilmour's famed Big Muff™ that was used on Pink Floyd's The Wall?

Official Product Video

Astoria '73 Ram's Head

Originally inspired by Black Sabbath's Vol. 4, I wanted to make a pedal that could get every guitar tone off that album. I got that a more.

The overall tone of the Electric Warlord is huge. The velcro-like fuzz is tight and has lots of clarity. This is great for all tunings and lots of styles from rock to stoner to doom to shoegaze.
The gain section has been designed so you can hear the ripping, velcro fuzz on every string. The pedal has a great range on the fuzz knob and when you turn the gain all the way down, you can get a gated-like fuzz on leads. 
The pedal has a perfect mix of bass and treble where you can feel the thump of the low end under the fuzz so it does not over-power the overall tone yet, you still know the low end is there. 

Review by guitar pedal X

Demo by Brett KIngman