Bon Plan Gratos

This plugin gives you the possibility to display ratings on posts / pages and also on Google search results.
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.
<h4>Important</h4>
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.
<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>
More information on shorcode, PHP function, etc… on plugin web page: 
http://bonplangratos.fr/wp/plugins/google-quick-ratings

Google Quick Ratings

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

innocuo

Admin Starred Posts lets you mark posts, pages and custom posts within the WordPress admin with stars. 
This helps you highlight a post, or mark it so you remember is important.
For example, you might have tons of pages, but are always editing one or two. In that case, star those pages, 
and they’ll be easily recognizable in your list of posts.
If you’ve used Gmail before, you’re very familiar with this feature. Similar to that email client, this plugin 
let’s you click on a star in your list of posts, pages and custom posts to ‘star’ it.
The plugin works out of the box, but you also get some configuration options to help you customize it to your workflow.
Configuration Options
<ul>
<li>Rotate between 12 different “stars”</li>
<li>Drag and set the orders of your stars</li>
<li>Enable/disable this feature for any post type in your WordPress install</li>
<li>Decide whether you want stars to be visible to every one, or in a per user basis.</li>
</ul>
Other Features
<ul>
<li>You can display only starred posts by using the “Stars” filter available at the top of the posts list.</li>
</ul>
This plugin requires WordPress 3.8 or higher

Admin Starred Posts

Nicely does the job of marking like email inbox. Some feature enhancements like adding from post edit page with a note will be great. 

Excellent plugin


This plugin is so useful for managing site wide updates and status of pages especially when working with a group- which are done, which need attention, which haven't been started. I install it on every site I've ever worked on, so I'm probably responsible for at least a hundred of the active installations. Please keep it updated and tested!!


I absolutely love this plugin!

Mark posts, pages and custom posts in your WordPress admin; pretty similar to the stars feature in Gmail.

Google Quick Ratings vs Admin Starred Posts