FPDI 2.x Introduction and Index
FPDI is an extension for FPDF that allows you to import single pages of existing PDF documents into a structure that can be reused with FPDF. It also offers templating functionality for FPDF through the FpdfTpl class.
FPDI is published under the MIT license.
The »F« in FPDI stands for »free«: you may use it for any kind of project and adapt it to your needs - the license conditions of the MIT are met nevertheless.