Finding Worthwhile Web Pages is easy if you use these more selective tools rather than a general search engine. The WWW Virtual Library is somewhat uneven, depending on the topic, but the others are all very selective in the webpages they choose to include. The non-U.S. ones are broadening in other ways as well. Always start your searches here!
"INFOMINE is intended for the introduction and use of Internet/Web resources of relevance to faculty, students, and research staff at the university level. It is being offered as a comprehensive showcase, virtual library and reference tool containing highly useful Internet/Web resources including databases, electronic journals, electronic books, bulletin boards, listservs, online library card catalogs, articles and directories of researchers, among many other types of information. " (from their homepage) INFOMINE has its own internal search engine and includes over 125,000 sites. It is maintained by librarians at UC Riverside and other California universities.
IMPORTANT NOTE: Infomine includes a lot of fee-based resources. To just get free websites, click on ADVANCED SEARCH and select FREE from the RESOURCE ACCESS pulldown menu.
This is "...only the best Internet resources, as chosen by the editorial staff of the Scout Report." (from their homepage). They provide superb critical, and very interesting, descriptions of the more than 25,000 sites in the current database. You can search or browse by subject heading.
This is THE science search engine. If you want to be sure you are getting REAL science, this is how you want to search the web. It has over 450 million webpages, including abstracts from Medline, free journal articles, information on scientific conferences and meetings, and much, much more. This is an outstanding tool. The Advanced Search mode has many options.
ipl2 is the result of a merger of the Internet Public Library (IPL) and the Librarians' Internet Index (LII), two of the best web catalogs available.
This is about as big as Yahoo with sites selected and annotated by "Guides" with varying degrees of expertise. Annotations are often chatty and oriented more towards the popular and general than academic. Use " " around phrases to search.