http://www.utoronto.ca/deeds/research/research.html

"An important new online resource that's recently become available is DEEDS [Michael Gervers, University of Toronto] - a collection of the Latin texts of more than 8000 charters extracted from 170 published cartularies, mainly from the 12th and 13th centuries. The original emphasis was on Essex (the acronym stands for Documents of Essex England Data Set), but the collection also covers other parts of England and Wales. The largest numbers of charters come from Lincoln Cathedral, the Order of the Knights of the Hospital of St John, and the abbeys of Oseney, Cirencester and Eynsham. The collection can be browsed or searched (remember that the text is in Latin when picking keywords!), and for each charter there is normally a link to a scan of the published version (which may include an abstract in English). The interface takes a bit of getting used to - and the server seems to be a little temperamental - but there's a huge amount of information behind it. "

Quoted from
http://www.medievalgenealogy.org.uk/updates/update.shtml