Star Rating is an extension that allows the addition of a rating system to your eZ Publish content objects via a datatype. This extension uses Ajax calls through the xajax extension to save the vote without reloading the page, and checks the user's session to ensure that he or she doesn't vote more than once.

To use this extension, we only need to add the Star Rating attribute to the content class that we want to be rated, and update its view template.

You can download Star Rating from http://ez.no/developer/contribs/applications/star_rating.