The International Virginia Woolf Society
http://www.utoronto.ca/IVWS/

Each year, this site creates a bibliography of Woolf Studies; right now, the site houses bibliographies of each year from 1996 to the present.  The site also has links to other sites on Woolf’s individual novels, on film adaptations of her work, etc.

Woolf Online
http://www.woolfonline.com/

This site offers a look at the multiple drafts and revisions for an experimental passage in the “Time Passes” section of To the Lighthouse.  It also includes contextual material for the study of the passage, including Woolf’s diary entries, her critical essays, biographical information, etc.