This is a framework for generating and displaying invoices (ideal for commercial Rails apps). It allows for flexible business logic; provides tools for tax handling, commission calculation etc. It aims to be both developer-friendly and accountant-friendly. The Ruby Invoicing Framework is based on {ActiveRecord}[http://api.rubyonrails.org/classes/ActiveRecord/Base.html]. Please see {the website}[http://ept.github.com/invoicing/] for an introduction to using Invoicing, and check the {API reference}[http://invoicing.rubyforge.org/doc/] for in-depth details.