This is another shipping module for Zencart. I have been working on the UPS XML module for awhile now. I have ported over the more advanced packing algorithm from the UPS module, to allow packing support in the USPS shipping module. This module allows Zencart to calculate shipping for multiple boxes for a freight quote. The default behavior for Zencart is to place all items in one box with a total weight to send for quote. With this updated USPS shipping module, items will be packed into boxes you enter, or you may set items to always be packaged separately. The module then returns the aggregate shipping cost for your packages. This should provide much more accurate shipping quotes. Continue reading Zencart + USPS Webtools with Multiple Package Support
Zencart + Free Shipping USA Shipping Module
Many websites offer free shipping in the USA. The default shipping module for zencart does not allow a store owner to easily handle it. In the configuration of the shipping module, you set the desired country (USA) to display free shipping to, and any of the other options that are available in the standard freeshipper module included with zencart. The zip file contains just 2 files, the shipping total, and a english language define. Install instructions are included in the download. Very easy and fast to install.
You may download the module form bitbucket.org, or even help contribute to it.