Earth & Sky: How is wind chill calculated? - Answers the question, and gives some history of wind chill. - http://www.earthsky.org/radioshows/48415/how-is-wind-chill-calculated
NASA's Observatorium: Wind Chill - Contains a wind chill chart, calculator, and cold weather dangers. - http://observe.arc.nasa.gov/nasa/earth/wind_chill/chill_home.html
CBC News Indepth: Wind Chill - Article explaining wind chill, with the lowest wind chills experienced in Canada. - http://www.cbc.ca/news/background/forcesofnature/windchill.html
Learner.org: Wind Chill - Tells why it feels colder when the wind blows. Has a wind chill calculator too. - http://www.learner.org/exhibits/weather/act_windchill/
NWS Windchill Temperature Index - Displays the United States wind chill chart, and answers frequently asked questions. - http://www.nws.noaa.gov/om/windchill/