Facebook isn't throwing in the towel when it comes to experimentation, but it has shuttered the project that sought to encourage it. Three apps born from its Creative Labs have been pulled from their respective app stores and the website for the initiative itself is no more. Creative Labs began as a way to encourage experimentation among the social network's employees through hackathon-type sessions, and it led to the development of Slingshot, Rooms and Riff. Slingshot is perhaps the most recognizable of the three for its attempt to take on Snapchat in the realm of ephemeral messaging. Facebook says that since those apps launched, it has pulled features from each into its core Android and iOS app.