The list is by no means exhaustive as it reflects the research interests of the members of the Reading Group. A more comprehensive list can be found here from the Institute of Medieval Studies at the University of Leeds.

A Clerk of Oxford
Erik Kwakkel
Geoffrey Chaucer Hath a Blog
Got Medieval
In the Medieval Middle
Sarah Peverley
Reading Medieval Books

The Database of Middle English Romance
Records of Early English Drama

Consulting Medieval Manuscripts Online
Digital Scriptorium
Digitized Medieval Manuscripts
The Manuscripts Lab
Medieval Manuscripts Blog
Medieval Manuscripts on the Web

Online Courses
Digging Deeper I: Making Manuscripts
Digging Deeper II: The Form and Function of Manuscripts

Middle English tools
Chaucer Concordance
Digital Index of Middle English
Middle English Compendium

Networks and forums
Forum for Medieval and Renaissance Studies in Ireland
Institute for Medieval and Early Modern Studies
Oxford Medieval Studies

British Branch of the International Arthurian Society
The Early English Text Society
The Hagiography Society
The International Association for Robin Hood Studies
The Medieval and Renaissance Drama Society
The Medieval Chronicle Society
The New Chaucer Society
Society for the Study of Medieval Languages and Literature
Society for Medieval Feminist Scholarship

The Camelot Project
Early English Books Online
Electronic Beowulf
The Robin Hood Project
TEAMS Middle English Texts