Ki Mae Heussner is a staff writer at GigaOm.

Stephanie Rosenbloom is a travel reporter with the New York Times.

Zach Sims is the founder of Codecademy, a start-up that teaches people how to code. 

Dr. Ari Brown is a pediatrician in Austin, Texas, and lead author of the American Academy of Pediatrics study on the media use by children.

Mark Schwanhausser is an analyst at Javelin Strategy and Research and studies trends in online banking. Here are the apps that he loves on his iPhone 4S and iPad.

Jacob Ford, 18, is a freshman at NYU's Gallatin School of Individualized Study, where he plans to pursue a degree in design.

Jonathan Bowles is the executive director of the Center for an Urban Future in New York.

Alex Goldmark, Senior Producer, WNYC’s Transportation Nation

Anthony Townsend, Visiting Scholar, Rudin Center for Transportation Policy and Management at NYU