You need to build it on your own. Some sites do this to provide sending data to facebook/twitter/etc due to social plugin includes on its website.
You can access your URL "like" count like this: https://api.facebook.com/method/fql.query?query=select%20%20like_count%20from%20link_stat%20where%20url=%22http://google.com%22
So you will be able to create the "normal" state on your own. On mouse over you will be able to load the social plugins.
This website shows you an other example for handling this: http://www.heise.de/newsticker/meldung/Apple-vs-Samsung-Hohe-Geldstrafe-kein-Verkaufsverbot-Berufung-2136834.html