Does anyone know of an effect that uses RF chokes in it? I've got quite a few of these little things, about 1/4" diameter x 1/2" long.

Chris B

I don't know any fx that use RF chokes a such, but they could be useful in series with inputs to stop radio signals getting in.

Chokes are both ineffective and unnecessary for the majority of effects.  It makes some sense to (judiciously) use them when your effect is digital (to stop RF junk getting out so you can pass RF emissions tests).