Twitter user @FashionistaChik asked me about those sometimes “pesky” but effective slide in WordPress plugins you see on many popular blogs. I recently was looking for one myself for SocialWayne.com and found three.
@waynesutton hi do you know the name of the plug that creates a pop up on the bottom right with a related topic. Expand
— TheFashionistaChic (@FashionistaChik) September 18, 2013
If you would like more control on what content to slide in then End Of Page Slide box is suggested. If you would like for post to be automatically selected then Slide in or SimpleReach works. SimpleReach comes with built in twitter and Facebook sharing as well. I’m using SimpleReach and will sometimes override it with End of Page depending on the context of the post.