Slipmate is a web based order fulfillment application that gives you control over advanced order routing and shipping.

Stamps is Stamps.com backed library for creating postage labels, calculate the shipping cost of packages, standardize domestic addresses via USPS CASS certified Address Matching Software, and track shipments.

NinjaVan 3PL shipping service API Caller for Ruby

This gem is a wrapper on Wing API v2, that offers shipping services (https://www.wing.eu).

Calculating VAT/GST/PST based on shipping rate, insurance fee, pickup_fee...etc

A http client for shipping events to Pushkin Service.

Adds in-store pickup as selectable shipping and payment option during checkout.

Configuration-free Rake tasks that read your gemspec. These tasks re-use built-in Rubygems functionality so you can be confident you're shipping what you think you are.