The Rating module allows you to build simple to complex rating and review websites using ExpressionEngine.

Using the module you can collect numerical ratings and textual reviews for weblog entries. Numerical ratings can be totaled, averaged and otherwise collected into statistics about weblog entries. The module includes pre-loaded graphics to allow you to show star, circle or bar representations of rating statistics.

Ratings can receive votes to be quarantined so that your users can police your site for you and prevent unwanted or unfair ratings and reviews. Users of your site can indicate whether a rating / review is helpful or not and these specific stats can also be shown to give community driven weights to ratings.

Non-members of your site can contribute ratings and reviews as well. Many more features are available in this flexible and powerful module. Check out the docs to learn more.