CakePHP-DataShell is a project mainly written in ..., it's free.
CakePHP - Data (im|ex)port shell
git clone git://github.com/rewish/CakePHP-DataShell.git
cp CakePHP-DataShell/vendors/shells/data.php {APPROOT}/vendors/shells/data.php
cake data export {Model name|Table name}
cake data import {Model name|Table name}