The Very Large Textual Object: A Prosthetic Reading of Shakespeare - Jonathan Hope and Michael Witmore locate repeated references to the word "hands" in Macbeth, and then link these repetitions to what the play is about: guilt and action. - http://extra.shu.ac.uk/emls/09-3/hopewhit.htm
Titles From Macbeth - A listing of book and play titles taken from Macbeth. - http://www.barbarapaul.com/shake/macbeth.html
The Land of Macbeth - Historical and educational account of Scotland as pertaining to Macbeth. - http://www.thelandofmacbeth.com
William Shakespeare's Macbeth - Quizzes and answers on selected scenes. Requires Java. - http://www.paaw.com/shakespeare/scottish_play/
LiteratureClassics.com: Macbeth - Historical context of Shakespeare's Macbeth, essays on characters, Etext and links to related resources. - http://www.literatureclassics.com/texts/46/
TheatreHistory.com: Macbeth - A critical analysis of the play. - http://www.theatrehistory.com/british/macbeth001.html