- Internet guides or directories provide convenient topical access to Web resources by organizing sites into subject categories and providing links to the listed sites. Many guides provide annotations or evaluations of the sites they list.
- About.com is one of the largest directories of websites. Each annotated guide is maintained by a different subject specialist.
- Google Scholar
- Indexes a portion of the scholarly literature in a wide range of research areas, with links to citations for books and the full text of peer-reviewed journal articles, preprints and technical reports.
- INFOMINE: Scholarly Internet Resource Collections
- Librarians at the University of California, Riverside have compiled more than 115,000 scholarly Internet resources into a database which may be browsed or searched by subject, keyword or title.
- IPL2 - Internet Public Library/
- Maintained by a group of librarians, this selective subject guide includes brief but informative annotations.
- Scout Report Archives
- This site contains the database of the Scout Report, a highly selective weekly report on new web sites of interest to the academic and research community, compiled by staff of the Internet Scout Project at the University of Wisconsin-Madison.
- WWW Virtual Library
- One of the oldest subject directories on the Web, the WWW Virtual Library provides links to topical guides maintained by subject specialists based at academic institutions worldwide.
- The largest subject collection on the Internet, Yahoo! is organized into a hierarchical subject tree. Yahoo! is comprehensive rather than selective, so may include some personal or commercial websites of questionable value.