Inc. - features relevant information on a variety of subjects. 4RedAnts - focuses on sites of interest to college students and young adults. All Academic - provides free academic searches of the internet.
Authors can index academic work as well.
AltaVista - web and newsgroup search engine. AOL Search - search engine and directory. Argus Clearinghouse - if you're interested in what the Net has to offer, the Clearinghouse can help. AtlasNav - a geographical directory. Best of the Net - categorized index of sites .