Reviews are one of the most popular types of content in the web. Reviews also make the author more professional in their field. If you are setting up a review site, having just reviews is not enough to prove you are an expert. Using these top 5 WordPress plugin will help you look like a pro.
Some of these plugins even take advantage of schema.org markup options which allow search engines to read, rate, and display in search engines, as well as other information like price, and the author.
Here is the list:
1. Benday Reviews System
2. Author hReview
3. Author Product Review
4. Review Schema
5. Easy Review Builder
Why these are great plugins is elaborated in this site: http://wpmu.org/wordpress-review-plugin/