Here’s an interesting controller I just finished for a customer. It swaps around the action buttons and d-pad, the left and right triggers are swapped, and there’s an extra set of X Y B A on the back.
The purpose of controllers like these is to allow more options for persons that may have a hard time with normal controller configurations. Remember, if you’re in need of custom devices, you can always email me to discuss. Please see this page regarding rates and terms.