Here are the links I use while doing web research on the Middle Ages. I also have a separate page for my research on Medieval Russia. If you have an interest in Medieval Russia or other Slavic lands, you should check out the Slavic Interest Group web page and consider becoming a member. It's free!
Costume Resources The Milieux home page, lots of costuming info about many different time periods and interests The Costume Page A comprehensive index of costuming and costuming links Duct Tape Double Studios: Directions for making your own dressmaker's dummy. Hey, it involves duct tape, it definitely applies to the SCA. I plan on making one as soon as I find someone willing to wrap me in tape...
The SCA Home Page: A basic starting place for SCA Arts and Sciences research. Just click on the Arts and Sciences link. House Athenaeum One of the Middle Kingdom's best Arts and Sciences pages, check out their fashion show pics! NetSERF: A good database of links for Medieval pages on the web Folklore Index: Online folklore sources arranged by country.
Viking Answer Lady Questions about the Vikings? Want to know what they wore, what they ate and what's the deal with those horned helmets? Check here! Thora's Page--Viking Resources Thora knows a lot about Vikings too. Lots of good clothing, textile and culture information.