Adds a notification before the actual post / page content when the post becomes old.
This plugin adds a notification to posts and pages when it becomes older that a define age. For example, if a post was written 4years ago, and you set the plugin to consider a post/page old after 2 years. a notification that the said post hasn't been updated in over 2years will be displayed. You are provided the option to change the plugin notification message and age.
More info at http://w3guy.com/wordpress-plugin-old-posts/