Digital Trends – Thereâs been quite a bit of talk about how Google ripped off some of Facebookâs features with its new social network, Google+. But it seems the biting goes both ways. Now, a group of four Facebook engineers have launched an unofficial Facebook app called âCircle Hack,â which allows users to organize their friends into lists in a near-identical fashion to the âCirclesâ tool in Plus â one of our favorite features.