Progressbar is a very simple plug-in for Wordpress that adds a customizable progress bar to your post. Multiple progress bars in a post are supported and progress bars can be completely styled using CSS.
After downloading, unzipping and copying the qixis-progressbar.php to Wordpress’ plug-ins folder (wp-content/plugins), activate the plug-in using the Wordpress administration panel. When the plug-in is activated it scans all posts for the tag ‘<progressbar …>’ and inserts a progress bar in its place. Multiple progress bars per post are supported. For more information about usage and styling the progress bar using CSS, please see the manual.