Getting The Most Out of Schema.org Microformats »
Schema Creator
http://wordpress.org/extend/plugins/schema-creator/
Provides an easy to use form to embed properly constructed „schema.org“:schema.org/Product microdata into a WordPress post or page.
Microdata for WordPress
http://www.optimum7.com/internet-marketing/web-development/microdata-for-wordpress.html
This plug-in adds a button on the TinyMCE Editor that helps you generate valid Microdata Code within your WordPress posts and pages.
