steve.barnett

Flexible hReview lets you add an <a href="http://microformats.org/wiki/hreview" rel="nofollow ugc">hReview</a> to a Post, then show that review anywhere on your site using the function or the shortcode. 
Also available on GitHub: <a href="https://github.com/SteveBarnett/Flexible-hReview" rel="nofollow ugc">https://github.com/SteveBarnett/Flexible-hReview</a>.
The options page lets you set:
<ul>
<li>field names for multi-dimensional reviews</li>
<li>the maximum rating</li>
<li>whether or not to calculate and display an average of the ratings</li>
<li>characters for before and after the rating text</li>
</ul>

Flexible hReview

Easily add hReview data to a Post. Show it anywhere using the function or the shortcode.

conoro

This plugin enables LouderVoice clients to quickly and easily display customer reviews on their WordPress site.

LouderVoice Reviews

Accept and Display LouderVoice Reviews on your site.

Flexible hReview vs LouderVoice Reviews