Several websites are now essential viewing for all those interested in Anglo-Saxon charters. Amongst these are:

The Electronic Sawyer Currently under revision by Rebecca Rushforth in Cambridge, which provides manuscript and bibliographic information on each charter.
The Prosopography of Anglo-Saxon England (PASE) PASE is now the largest collation of primary information ever assembled about the period. Sean Miller's website contains, amongst other material, searchable full texts of all charters.
Kemble Simon Keynes' website provides access to an array of information and external sites as well as hosting the British Academy's Joint Committee on Anglo-Saxon Charters.
LangScape Joy Jenkyns' Langscape is one of the projects with which ASChart has interoperability.

The following institutions have been involved the ASChart:

Centre for Computing in the Humanities
King's College London
The British Academy