What We Like: 
Powered by the Univision API, iHeartRadio is an app that allows listerns to find the best of live radio, create custom stations, and share your favorite and personalized stations from wherever you access the app. We love how the app has added 10 new college radio stations, including Emerson College.
API: 

http://developer.univision.com/

Application URL: 

http://itunes.apple.com/us/app/iheartradio/id290638154?mt=8

Platform: 
iPad
iPhone