Boss AC-3 Acoustic Guitar Simulator Pedal
Using Roland’s proprietary COSM modeling technology, the Boss AC-3 pedal can make any electric guitar sound exactly like an amplified electric guitar. It includes four basic acoustic guitar models, standard, jumbo, enhanced, and Piezo-equipped. These can be further altered by the top and body controls allowing you to create the perfect acoustic guitar sound. Then you can enhance it all with the AC-3’s built in digital reverb.
Electro-Harmonix Ravish Sitar Pedal
The Electro-Harmonix Ravish Sitar Pedal turns your electric guitar into the ultimate electric sitar, with full control over the lead voice, sympathetic string drones, tuning, and scales. You can even use your favorite expression pedal (a Roland EV-5, or Boss FV500L will do nicely) to control pitch bending.
Electro-Harmonix Freeze Sound Retainer Pedal
I suppose this belongs somewhere in the delay or looper category, but the Electro-Harmonix Freeze Sound Retainer Pedal uses delay in a very different manner. Step on the pedal and hold any note or chord as long as you like or choose a fast or slow decay to release the sound.