Interapptive’s ShipWorks software provides online sellers with solutions to streamline their shipping process. ShipWorks makes it easy to ship more in less time by eliminating manual data entry. A free 30-day trial is available to all eBay sellers.

Quickly process shipping labels, in bulk or individually
Pre-fills shipping labels with customer address information
Multi carrier support - integrated with DHL, FedEx, UPS, USPS, Endicia, and Stamps.com
Domestic and international shipping label support
Automatically generates customs forms for international shipments
Automatically prints invoices, packing slips, and reports
Fully customizable invoices, packing slips, emails, and reports
Automatically emails customers with tracking and order information
Automatically updates eBay with shipped status and tracking numbers
Leave feedback for your buyers, in bulk


Benefits:
Automates shipping and post-sale tasks
One software installation supports multiple shipping carriers
Enhances and streamlines customer service
Efficient packing with combined packing slips and shipping labels.
Reduces human resource costs

http://certifiedprovider.ebay.com/ns/ShipWorks.html