Back in those Days
The Viking Network -- Some basic, introductory articles on food, clothes, horses, and other aspects of life in the Viking Age.
Internet Medieval Sourcebook -- Primary documents concerning social classes, sex and gender, economic life, people reflected in literature, law theory and practice.
Ancient & Medieval Falconry -- Very good general overview of the origins of and history of falconry by Shawn E. Carroll at the Richard III Society.
Jim's Medieval Coins -- over twenty examples of coins that are anywhere from 600 to 1000 years old.
A Medieval Christmas -- So what was it like to celebrate Christmas in the Middle Ages?