Provides rich snippet rating/voting functionality for every content of a page.
You can customize size, orientation and colors of the rating/voting.

Star Snippets – Rich Snippet Vote

Provides rich snippet rating/voting functionality for every content of a page.

jitendravaswani

What is a Rich Snippet? 
Rich Snippets is the term used to describe structured data markup that site operators can add to their existing HTML, which in turn allow search engines to better understand what information is contained on each web page. See example on our blog : <a href="http://www.bloggersideas.com/how-to-make-product-review-site-with-wordpress-to-make-money/" rel="nofollow ugc">Usage of SchemaNinja</a> 
How does a Rich Snippet help? 
It gives search engines only the important & precise information to display in search result snippets.
Rich Snippets are very interactive (photos, star ratings, price, author, etc.) to let you stand out from competition on SERP�s. There are high chances that users will click more on Schema results than non schema results. 
Supported Content Types – 
This plugin suppojitendra.coowing types of Schemas: * Review * Product * Software Application * Video * Articles 
Future release would include – 
More pro recommendations features in SchemaNinja new version.
We Follow Google Standards 
This plugin is modeled and will be updated according to Google guidelines that you will find here: https://developers.google.com/structured-data/
You can validate structured data on any web page here: https://developers.google.com/structured-data/testing-tool/ 
For more information about the plugin author visit:
<a href="https://www.bloggersideas.com" rel="nofollow ugc">Jitendra Vaswani</a> 
<a href="https://twitter.com/JitendraBlogger" rel="nofollow ugc">Twitter</a>
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Schema Ninja

Schemaninja is one of the finest schema rating & recommendation plugin I have seen in wordpress directory. Plugin is neat and clean and I particularly like the design of the plugin. I would recommend schemaninja for schema rating plugin. Do try it out and you will love it like Ninja. 

Best Schema Rating Plugin

SchemaNinja Rich Snippets & Recommendation plugin.  SchemaNinja can Boost CTR, Improve SEO & Rankings. Supports most of the content type.

Star Snippets – Rich Snippet Vote vs Schema Ninja