Does anybody know a Wordpress "related post" plugin with behavior like the one at inc.com. For a demo, visit any article at inc.com (ex: http://www.inc.com/guides/2010/10/how-to-design-a-great-about-us-page.html) scroll down to the end of the article and you will notice a box sliding in from the bottom right corner of the page.
Although this is just like any other related post plugin, I feel its behavior increases site retention.
Any pointers will be helpful.
Thanks in advance