University of Toronto (Canada)
University of Toronto: Sir Gawain and the Green Knight
Read the original Middle English. Within the text is also a modern English prose translation.
Luminarium
Luminarium: Sir Gawain and the Green Knight
This site provides a detailed overview of Sir Gawain and the Green Knight. Content includes an introduction to the text, three versions of the full text, numerous essays and articles which explore the text, and other resources.