The Cryosphere: Where the World is Frozen -- A National Snow and Ice Data Center website.

National Ice Center -- The Center is a joint operation of the United States Navy, the National Oceanic and Atmospheric Administration and the United States Coast Guard.

Snow Crystals -- A website created by a professor of physics at the California Institute of Technology.

SPRILIB Ice and Snow -- A website for the Scott Polar Research Institute at the University of Cambridge.