A jQuery page that appears with a user clicks and external link! use it to show messages, ads, or social buttons.
Doesn't seem to do anything and, even if it did, almost every feature is disabled unless you pay for the premium version.
Activating it and following the instructions does not turn it on.
Update: The plugin ONLY works on posts. The full version allows you to activate it across entire pages which includes widgets. Paid version on CodeCanyon works great, and the developer is very responsive there.