YPNHOI (Winner of "Most Schools" Prize)
YPNHOI stands for You've Probably Never Heard Of It. This app aims to surface places that aren't being talked about on twitter, that people aren't checking into on Foursquare, and that aren't being reviewed on Yelp. If you've heard of it, it ain't cool.
CheapChap
CheapChap helps plan your date in a cost effective way, by recommending cheap gifts, restaurants, and hotels.
Smilify.me
Smilify.me takes a photo of you every 5 minutes, and it charts your mood over time. If it determines that you're in a bad mood, it performs an intervention and shows you a picture of a lolcat or suggests that you go to take a walk in a nearby park (discovered through Hyperpublic of course).
There were many great apps built by some incredibly talented students. We look forward to presenting and participating in many future hackathons.

