Here is a great way to add versatility to your pedals. Switching the order of your effects can sometimes give the subtle (or not so subtle) differences that you may want to have access to with a push of a button. It uses a 4PDT footswitch and has LED indicators to show which order you are using. This can be used with two single stompboxes or combinations of loops of stompboxes.

Description from General Guitar Gadgets.