This is a tone collection of circuit, the most popular and most used circuits and offers some less well-known.
Simple circuit, perhaps the most simple control circuit. Only two members. This uses the Valvecaster effect.
The Baxandall circuit. Butterfly-shaped curve.
The very famous Big Muff circuit.
Yes, yes, well you see. the Fender and Marshall the same circuit, only the parts value of the change.
And the famous Vox AC series two-button control circuit:
Tone calculator program
This is a very good utility, the most popular control circuits: