Allows a post author to assign a simple 1-5 star rating to a post, page, or custom post type, which will then be displayed on the post. It will boost SEO.
There are plenty of systems available which allow site visitors to rate posts, but I didn't find any that gave the post author that functionality, so this is alternative solution. Author Post Ratings adds a meta box to the post edit screen, allowing you to chose a 1-5 star rating for the post, or to leave it unrated. The plugin will automatically add the post rating (using stars, and an optional label) to the top or bottom of the post. If you wish, you can disable that functionality altogether and use a shortcode to insert the post rating anywhere in the post you choose.