EUPSCO is very nice free tool for Orchestrator. This tool provides a web portal for starting and adding input to the Runbooks. The portal also provides a simple Service Request integration with approval steps and the ability to give different people access to different Service Requests.
The setup is fast and easy but the full documentation is missing. The setup documentation is provided at the product blog and you will need a little bit of IIS knowledge to get it all working.
Here is some screenshots of the Web Portal
Main page of the portal as an administrator.
Configuration page for the Runbook portal.
Configuration page for the input parameters to the Runbook.
Request page for non administrator.
History page of requests.