I have USPS and UPS set up as carriers, but sometimes a drop-shipped item will be shipped via FedEx. When this happens, and I mark it as shipped, I only have the option to select USPS or UPS for the shipping method.
I would like the ability to add arbitrary shippers without having to have an account with them (FedEx, DHL, etc.) or even just a catch-all "Other" in the list in addition to my set up carriers.
This would also allow us to mark a package that was locally picked up or delivered as "shipped" without having to erroneously select USPS or UPS as the shipping method.