We've been using ShipWorks for many years to process and ship orders. It is a real time saver with our shipping process and end of year accounting.
ShipWorks is a third party installed shipping manager (PC) that aggregate orders from multiple shipping platforms for shipping orders. As I've been using ShipWorks for over a decade now, I'm a big supporter. Having made my life simpler from Day one, it facilitates easy aggregation of orders from multiple selling platforms, bringing all order into one program for easy shipping, processing, order and customer updating. Can have a learning curve for doing custom stuff, but is generally easy to pick up and accomplish. I find their support staff great to work with. Recommended for vendors on multiple selling platforms.