Openmrs-generator is a project mainly written in Ruby, it's free.
Rails Plugin framework generator for the OpenMRS data model
OpenMRS® is a community-developed, open-source, enterprise electronic medical record system framework. See http://openmrs.org/wiki/OpenMRS for more info.
This project aims to simplify working with the complex OpenMRS data model in Rails applications by accomplishing the following goals:
Automation of database migrations to create tables according to the latest OpenMRS Data Model release.
Generation of subsequent models in ActiveRecord complete with primary and foreign key specification, association definitions.
Methods in each model where appropriate to faciliate working with data in the most generic way possible.
Note: this is a work in progress under active development and is NOT ready for prime time yet!