publicly available courseware (lecture notes, handouts, slides, tutorial material, exam questions, quizzes, videos, demonstrations etc) from the world's universities, colleges and other educational institutes; other educational resources
The invisible web, or deep web, is estimated to be 500 times bigger than the searchable web and comprises databases and results of specialty search engines that the popular search engines can't index.
Firefox extension offers an addictive way to search via categories or keywords or happenstance; you train it, with thumbs up or down on sites, so it learns your tastes; I prefer searches on keywords so far, and have had little desire to "network"
CiteULike is a free service to help academics to share, store, and organise the academic papers they are reading. When you see a paper on the web that interests you, you can click one button and have it added to your personal library.
updated 2006. Topics include historical periods for British and U.S. Literature, Theatre and Drama, Theory, Women's Literature & Feminism, Ethnicities & Nationalities, Hypertext