The Labyrinth: Resources for Medieval Studies Sponsored by Georgetown University.
The Old English Pages Maintained by Cathy Ball of Georgetown University.
ORB Encyclopedia: Contains articles on Roman and Anglo-Saxon England (as well as tons of other medieval info!).
The Internet Medieval Sourcebook: Contains texts and secondary source materials.
Netserf: Over 1400 links to other sites
Ša Engliscan Gesižas: Contains links to articles, audio and Old English language lessons.
HEL (History of the English Language: Dan Mosser's incredible site.
Luminarium: Excellent resource for medieval, renaissance and 17th century material.