Have you heard about Vibe? It’s a Twitter clone capable of discrete communication between users without the need to log in and has attracted attention recently due to its popularity amongst Occupy Wall Street protesters. The app, billed as an “Anarchist Twitter,” is available for both iPhone and Android. It emphasizes anonymity and has become the communication weapon of choice for activists in the field. Think of it as the antithesis of social media snitch platform Foursquare.