A plugin that will allow users to rate any content item on a WordPress or WordPress MU site. Provides special integration handlers for common content
The simple-karma plugin allows users to rate content by altering the rating either up or down. This plugin can be used with comments, posts or any other content.
Note: In the WordPress svn repository the plugin is incorrectly named simplekarma-content-ratings. Be sure to rename the extracted folder to "simple-karma" before installing it in the WordPress plugins directory.