Function F(x) Clusterfuzz

Original FSB thread and schematic available here.

DeadAstronautFX Space Patrol Fuzz

Deadastronaut's version of the Big Muff.
Original DIY thread and schematic are available here.
There's also another great layout by Mug in the Forum section.

Digiplay/Panther/Rayder/Stinger OD-30 Overdrive

To my ears, this is an overlooked gem.

Update! Built it myself and yes it sounds as great as i remembered. However. I do recommend going stright for C10K pot on the drive control. And it doesn't hurt to up the "12K*" to 22K. This way the output level goes up to "modern sufficient".

Ceriatone Klein-ulator

Here is something a bit different and maybe useful!
It's an "effects loop buffer".
There isn't a schematic for it but you can find the original layout on Ceriatone's forum here.
You can also find all infos on their original manual here.
12/03/17 Layout updated! Moved 220K resistor and link from S to G on the top J201.

Catalinbread Manx Loaghtan

I know there have been veros around for a while but I wanted to add this project to the main page.
It's basically a Rams Head Muff with an added Baxandall tone control.
You can find original FSB thread and schematic here.
It should easily fit it in 1590B size box.

Crank both treble and bass and you get a classic scooped midrange. Back both off, while turning up the volume knob and your midrange content increases. Park the treble and roll back the bass and the midrange scoop frequency shifts downward so you have complete control over which frequencies you are cutting. Roll the bass below noon and you start to add a bump to your midrange, which is great for running into a hot amp. This tone control style is capable of numerous sounds, making the Manx Loaghtan one of the most versatile pedals of this style.” - See more at: http://tonereport.com/blogs/lifestyle/big-muff-shootout/page/three#sthash.Pt8yzCYp.dpuf

Baxandall tone control

Rams Head Muff

Rams Head Muff

Rams Head Muff

Rams Head Muff