Thumbs Rating: Add Vote Up/Down Buttons to WordPress
Producing great content is the best way to grow your website and encourage your visitors to come back for more. Not everyone is going to like every post on your website. With Thumbs Rating, you can add thumb up/down buttons to your pages to get valuable feedback from your visitors.
Thumbs Rating lets your visitors vote on your posts. You can add these buttons to your posts, pages, and custom post types. The plugin keeps your visitors from voting on each page more than once. Webmasters have the option to customize the output using custom CSS.
Thumbs Rating lets you show buttons and the most voted items using shortcodes. It does not use any image or fancy fonts to work. The plugin is available for free.