See also the student favorites discussion on Canvas.
NY Times Admissions Gap
Willamette River Historical Stream Channels by Daniel E. Coe
Dark Sky iPhone App and Forecast.io
Partly Cloudy App
Feltron Annual Reports
Wind Map
Typographic Maps
XKCD Heatmaps
XKCD Map Projections
Commute Times
Collection of NYTimes Visualizations
Spirals for Periodic Data
Beautiful but Terrible Population Pyramids
Hipmunk
What Do New Yorkers Complain About?
(These are unordered, and fairly random links taken from some of my favorite blogs.)