Portal with wide variety of categories; most useful are the evaluative and descriptive annotations for each entry, so you can see how the possible "consumer opinion," for example, sites vary. Place to find free reference tools.
one of the largest set of links, updated regularly, to all aspects of communication; many political themes; a wide range of disciplinary approaches included; highly recommended
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.
a visual map, with links, of how to use metasites for knowledge acquisition, research, and reading online; author has other such maps on his site; useful for students as mode of presenting info and for info itself.
excellent UK academic search tool for all disciplines. I looked up "film theory,' "feminism" and "television" and got useful results of sites I had not visited before, and some I had.
This is a top-notch new kind of search engine (Web 2.0). My test case for searches is "film theory" as the search term, and such a search brought me many new resources I was previously unaware of.