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.

Brainstorm Force

Pratik Chaskar

Nikhil Chavan

Adds JSON-LD based breadcrumb schema to your site visible only to the Search Engines such as Google.
Credits – <a href="https://github.com/Yoast/wordpress-seo/blob/trunk/frontend/class-breadcrumbs.php" rel="nofollow ugc">SEO Yoast</a> for the base breadcrumbs class.

JSON-LD Breadcrumbs

This is really great. Thank you very much

Great Plugin

Adds JSON-LD based breadcrumb schema to your site visible only to the Search Engines such as Google.

Review Schema vs JSON-LD Breadcrumbs