So here's one of my favourite creation, the glorious basstar is a 3 band overdrive. It's been designed for bass, but it works ok on guitar, I don't like it on guitar but you try and tell me!
The presentation on my website
(It'll be available in kit as soon as I get the batches of boards...)
Looks like that (On final version, volume and gain pots from mid band a reverse for ease of use):

The latest schematic : It's based on a x-tron filter (NO it's not an auto wha!), output of it feeding classic soft clippers and then a mixer.
I made a 7/8 pages document for schematic explanations:
In French: http://www.zorgeffects.com/images/Manue ... ata_Fr.pdf
In English: http://www.zorgeffects.com/images/Manue ... ta_Eng.pdf
A document with how to mount it from my PCB, and thus gut shots, will be available within next week...
Any question, critic, bash, or correction is welcome (I made the explanation doc late at night so it could be a bit messy...). I'll be following this post if you have any request!