Australian shipping API for shopping Carts
nopCommerce is an open source e-commerce solution that contains both a catalog frontend and an administration tool backend. nopCommerce is a fully customizable shopping cart. It’s stable and highly usable. From downloads to documentation, nopCommerce.com offers a comprehensive base of information, resources, and support to the nopCommerce community.

nopCommerce is a fully customizable shopping cart. It’s stable and highly usable. nopCommerce is an open source e-commerce solution that is ASP.NET 3.5 based with a MS SQL 2005 (or higher) backend database. Its easy-to-use shopping cart solution is uniquely suited for merchants that have outgrown existing systems, and may be hosted with your current web host or our hosting partners. It has everything you need to get started in selling physical and digital goods over the internet.  In addition, nopCommerce offers unprecedented flexibility and control. Since it is open-source, nopCommerce’s source code is available free for download.