IUCAT - Use the Advanced Search screen and try a combination of Library of Congress subject terms and keywords. Some useful subject terms:
anglo-saxon
anglo-saxons
english old
england social life and customs to 1066
great britain history anglo-saxon period 449-1066
history
sources
International Medieval Bibliography - The most comprehensive database for research in medieval studies. Does not use Library of Congress subject headings, but has its own highly detailed system. Browse the Subjects: Specific index for ideas if your keyword searches are unsuccessful. You can also use the Places index, and limit by Century (eg, 5th-12th).
Iter: Gateway to the Middle Ages and Renaissance - Also focuses on medieval studies. Uses the same subject headings as IUCAT. Includes books as well as journal articles.
JSTOR - fulltext collection of scholarly journals in all areas, including history/medieval studies. Most useful for very specific keyword searches.
ATLA Religion Database - For books and journal articles on religion-related topics. Include anglo-saxon as a descriptor (=subject term) in your searches.
Academic Search (EBSCO) - Broad coverage of many academic subjects. Good to get a quick sense of what might be available on topic. Uses Library of Congress subject headings, but keyword searches also work well (connect keywords with and )
If you're studying Latin and want to refer to Latin-language primary texts, here are a few big collections:
