James Swindle

You can add a reviewed item to any blog post and will display stars at the bottom of said post. Adding this Schema.org markup will show your rating in the Google result and better your search ranking in general.

Review Schema

This plugin will add Schema.org markup options for reviews.

michaellautman

Give your local SEO efforts a boost!
This plugin creates two new widgets that outputs contact information (URL, address, email, phone) according to the hCard microformat standard and Schema.org
In addition, each field can be assigned a unique CSS class for styling.
Visit the <a href="http://lautman.ca/forums/" rel="nofollow ugc">support forum</a> on our site for help.
<h4>Available Fields</h4>
<ul>
<li>
Widget Title
</li>
<li>
Name (Given, Middle, Family)
</li>
<li>
Organization
</li>
<li>
Address
</li>
<li>
Website
</li>
<li>
Email
</li>
<li>
Map (Organizations only – for now)
</li>
<li>
Telephone
</li>
<li>
Fax
</li>
<li>
Google Plus (rel=”author” for individuals and rel=”publisher” for organizations)
</li>
<li>
Facebook
</li>
<li>
Twitter
</li>
<li>
LinkedIn
</li>
</ul>
<h3>Notes</h3>
This plugin was built on the amazing <a href="http://piklist.com" rel="nofollow ugc">Piklist</a> using the [Piklist Plugin Builder] (https://github.com/michaellautman/Piklist-Plugin-Builder).

hCard Widget for WordPress

Creates a widget that outputs contact information for individuals or organizations with Schema.org compliant markup.

Review Schema vs hCard Widget for WordPress