Name: eShop Shipping Extension
License: LGPL v2
Demo Page: http://demo.usestrict.net
Product Info: http://wordpress.org/extend/plugins/eshop-shipping-extension/
I'd like to present to you eShop Shipping Extension for Wordpress. eShop is an excellent e-commerce plugin, but it's extremely tedious to set up shipping manually. This extension makes live calls to Canada Post (free) and can also be extended to use USPS, UPS, Fedex, and Correios. It's easy to use and saves you the trouble of having to set up/update shipping prices manually.