D3.js (Data-Driven Documents), a framework for web-based data visualization, has received the 2013 Gannett Foundation Award for Technical Innovation in the Service of Digital Journalism, from the Online News Association (ONA).
D3.js was created by UW CSE professor Jeff Heer, his former Stanford Ph.D. student Mike Bostock (now at the New York Times), and external contributor Jason Davies.
Check out D3.js here.