Plugin name for peek-a-boo share buttons

Hi all… I would LOVE if anyone knew the name of the plugin for the share buttons that are half-visible and then pop up fully when they are hovered over. The site where I saw it in use has no contact info for me to ask them. Here is a sample post there–the plugin with share icons appear at the end of each post. http://imos-journal.net/?p=1411

PS- There is a “share and follow” plugin that is similar–but doesn’t have the peek-a-boo pop up feature.

Thanks so so much for an info…