Active Shipping is now available under an open source license. It’s on GitHub, here. Active Shipping is an extension for Active Merchant which I wrote to let Shopify users provide carrier-calculated shipping rates to their customers. You can easily include Active Shipping in your Rails project as a plugin (or in any other ruby project, for that matter) and start doing things like this:


It’s under active development and more details for contributing to the project can be found in the README.