Stowe Reporter http://www.stowetoday.com/stowe_reporter/
Vermont Ski and Snowboard Museum http://www.vtssm.org/
Skiing Heritage http://www.skiinghistory.org/

International Skiing History Association site containing links to an amazing amount of resources!
PugSki http://pugski.com/

This website is recommended by RetroSkier Doug Briggs. In addition to current topics, the Forums contain some Retro threads.
Epic Ski RIP! This website closed its doors in May 2017!
Vintage Ski World http://www.vintageskiworld.com/

You can both look at and buy vintage ski equipment!  Can you believe some of the prices!