America's Coolest College Start-ups 2013

4 of 13
Courtesy Company

Firefly

Screensharing is not a new idea, but these three hackers from the University of Pennsylvania figured out how to make it impossibly easy--no special software required. Dan Shipper, Patrick Leahy, and Justin Meltzer coded the app at the PennApps student hackathon on campus in January 2012 and now sell it for $15 to $60 a month. So far they have 50 paying customers.

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