Bon Plan Gratos

<p>This plugin gives you the possibility to display ratings on posts / pages and also on Google search results.</p>
<p>It is extremely light, very fast to load, comptabible with all versions of WordPress and will not break any of your plugins. It is inspired of similar existing plugins, but remains very simple. As you know, page speed is a factor to increase Google ranking, as well as the use of rich snippets.</p>
<h4>Important</h4>
<p>Rating function is voluntarily limited to authors (only authors can rate, and not visitors) through the admin panel, in order to remain as light and fast as possible.</p>
<h4>Main functionnalilties</h4>
<ul>
<li>Rating from 0 to 5, with a 0.5 step, in the post edit screen, </li>
<li>Use of Google snippets to help Google to display ratings in search results,</li>
<li>Rating tags detected in Google Webmaster Data Highlighter tools,</li>
<li>No use of javascript / ajax to improve loading,</li>
<li>Different format of ratings available (star, heart, gradient),</li>
<li>Use of sprites to improve loading of PNG images,</li>
<li>Automatic display of ratings in posts, pages or both,</li>
<li>Possibility to display ratings in posts through ‘shortcode’,</li>
<li>Possibility to display ratings anywhere with ‘php function’.</li>
</ul>
<h4>Additional information / help</h4>
<p>More information on shorcode, PHP function, etc… on plugin web page:<br />
http://bonplangratos.fr/wp/plugins/google-quick-ratings</p>


Google Quick Ratings

The lightest and fastest plugin to rate posts and pages by their authors, comptatible with Google rating snippets.

Chasil

<p>Universal Star Rating provides shortcodes to give the author the opportunity to add ratings/reviews for desired data, products and services with the aid of a classic star rating system. You can make use of these shortcodes to embed a single inline star rating or a tabular list of star ratings.</p>
<p>To insert a single inline star rating inside a post just type <code>[usr 5]</code> where 5 is the rating/amount of stars.</p>
<p>To insert a tabular list of star ratings inside a post just type <code>[usrlist "Pizza:3" "Ice Cream:3.5" (...)]</code> where the first value is what you want to rate and the second value is the rating/amount of stars. Your list should consist of more than 1 key:value pairs.</p>
<h3>Translations</h3>
<p><em>Note:</em> This plugin is localized / translatable. This is very important for all users worldwide. So please contribute your language to the plugin to make it even more useful. See <a href="https://translate.wordpress.org/projects/wp-plugins/universal-star-rating" rel="nofollow ugc">Translations</a></p>


Universal Star Rating

USR provides shortcodes to give the author the opportunity to add ratings for desired products and services with the aid of a star rating system.

Google Quick Ratings vs Universal Star Rating