This plugin lets you add different kind of links into your website, with widgets, shortcodes, or php code.
This links will open a popup that gives the visitor more informations, you will be able to customize the text for privacy policy, terms and conditions, refund policy, you can also add a customized link for the credits of the website.
Dieses Plugin steht zum Download zur Verfügung, um in deiner selbst gehosteten WordPress-Installation verwendet zu werden.