Zf1-doctrine2 is a project mainly written in PHP, it's free.
Integration of Zend Framework 1 and Doctrine 2
This project demonstrates how you can integrate Zend Framework 1.10.X with one of the most popular PHP ORM framework, Doctrine 2.
The ZF 1 and Doctrine 2 integration work is done by Giorgio Sironi. I borrowed the source code from Giogio's nakedphp project.
The easy to use "Application_Api_Util_Bootstrap" class is the good work from Leonard Dronkers.
As the author of this project, I take no credit in all the good work done by Giogio and Leonard. I simply put them together into a bare bone Zend Framework project.
By putting this project on Github, I hope it could save other people some time in finding ways to integrate ZF 1 and Doctrine 2.