An often overlooked pedal, especially for playing guitar live, is the ABY pedal. In this video, I show a few different ways you can use an ABY or AB pedal for guitar. I'm using the Donner ABY Box that is $30 on Amazon. It is an inexpensive, yet useful device.
You can use it to plug one guitar into two amps at the same time, or switch back and forth between two amps, or have two signal paths for your pedalboard, or have two guitars plugged up ready to switch between the two with the press of a button. You can also use it to record a wet and dry guitar signal at the same time.