Pollio is a social polling app for Android phones. Its development was jump-started over a weekend at the PennApps Fall 2013 hackathon at the University of Pennsylvania. Pollio's team was Dumbledore's Army, consisting of Joe Trovato, Alex Burka, Ellie Pavlick and Alex Salz.
The app consists of a server component (in the django directory) and an Android app (in the eclipse directory, compiled as pollio.apk). Here is a video demo: https://www.youtube.com/watch?v=0nlp1XQ0PVI