You can find the full text of Canterbury Tales at the Electronic Text Center at the University of Virginia.
Luminarium has many essays on the Wife of Bath's tale.
Another great site is Washington State University's Chaucer page, which contains essays on his works, historical background, image archive and much more.
NetSurf provides many resoucres on medieval culture.
Southern Illinois University's Chaucer site provides a good list of the most important events in Chaucer's England.
All of the sites listed above were accessed on November 16, 1997.