http://www.mnsu.edu/emuseum/history/middleages/ A great guide from the Minnesota State University!
http://www.renaissanceconnection.org/main.cfm An interactive site from the Allentown Art Museum.
http://ed.fnal.gov/lincon/f97/projects/guildhall/guilds/guilds.html Learn all about the guilds and what it takes to become a Medieval crafter!
http://www.eyewitnesstohistory.com/mefrm.htm First-person accounts of many historic events during the Medieval / Renaissance periods.
Middle Ages .Net - Information-packed site featuring Medieval people, careers, plagues and weapons
http://www.nationalgeographic.com/castles/enter_castle.html Explore a castle in this National Geographic site
A Boke of Gode Cookery: Medieval Recipe Translations - If you are ready to create a true medieval feast, this is where to find the English translations of recipes. The site is easy to use. Just select the type of food desired from the list that includes beverages, breads, cakes and pastries, seafood, desserts, pastas, poultry, soups, and more. Then click on a specific recipe. If you aren't sure what one of the terms means, look it up in the recipe glossary.
Journey Through the Middle Ages - ThinkQuest Jr. presents a simple game-like web site. Begin as a squire on a quest for knighthood and explore the castle. Learn the importance of a coat of arms, how armor is made, what foods were eaten, and what it meant to be part of the royal family. Explains feudalism; knighthood; weaponry; and Medieval trades, recreation, and education..
Middle Ages from the Annenberg Foundation - This site provides a good introduction to feudal life, religion, clothes, homes, entertainment, and health during the Middle Ages.
Secrets of Lost Empires: Medieval Siege - NOVA online presents this site about life in medieval castles and the military. This site explains how trebuchets (or catapults) were used in military attacks during medieval times and how they are made.
Welcome to the Middle Ages - This About.com feature on medieval times has links sprinkled throughout the paragraphs. Learn what knights and monks did in the Middle Ages and discover the importance of castles. Lots of pop-ups, but decent info.
Medieval Women - Excellent interactive virtual tours of a nunnery, Paris, town life, and more.