LibDex

World index of library sites with over 18,000 database entries. Includes a list of libraries by catalog vendor.
http://www.libdex.com/

The WWW Library Directory

Searchable directory of over 8,000 library and library-related sites worldwide arranged by countries. Includes a US section sorted by states.
http://www.webpan.com/msauers/libdir/

School Libraries on the Web

Worldwide directory of school library sites. The US categories also list related library organizations.
http://www.sldirectory.com/

Lib Web Cats

Searchable database of over 5,000 library sites worldwide. Listings include mailing addresses and links to online catalogs.
http://www.librarytechnology.org/libwebcats/

ALiNUS

Searchable directory of academic library newsletters in the United States.
http://www.snhu.edu/Southern_New_Hampshire_University/Library/Electronic_Resources/ALiNUS_Home.html

Libraries of the World and their Catalogues

Links to national, academic and public libraries and their catalogues. Compiled by Sylvia Milne, a retired librarian.
http://www.sylviamilne.btinternet.co.uk/plucked/libcats.htm

ISBNDB

Multilingual database of international standard book numbers. Offers the possibility to investigate by category.
http://isbndb.com/

Library and Related Resources

List of references indexed by topics like public, school and national libraries. Also includes sections about organisations and science resources.
http://www.ex.ac.uk/library/wwwlibs.html

National Library Catalogues Worldwide

Index of libraries with detailed descriptions about the handling of the search interfaces sorted by countries.
http://www.library.uq.edu.au/ssah/jeast/

NLS/BPH: Reference Directories Index Page

A list of directories provided by the U.S. Library of Congress, National Library Service for the Blind and Physically Handicapped.
http://www.loc.gov/nls/reference/directories/

UNESCO Libraries Portal

Searchable directory for libraries worldwide sorted by category. Includes links to libraries of secondary schools, universities and other tertiary institutions.
http://www.unesco.org/webworld/portal_bib/Libraries/

Library and Information Science

IFLA list of world wide web accessible libraries worldwide sorted by countries.
http://www.ifla.org/II/natlibs.htm

Global Reach

Searchable database which shows the involvement of librarians and libraries in international library activities.
https://cs.ala.org/global/

Internet Quick Reference Shelf: Library Resources

Collection of links presented by the University of Indiana categorized by topics.
http://www.indiana.edu/~librcsd/internet/Library_Resources/

Law Libraries Worldwide

Chan Robles & Associates provides links to major law libraries around the world.
http://www.chanrobles.com/lawlib1.htm

Veterinary Medicine Libraries

Guide to veterinary medicine libraries worldwide sorted by countries.
http://duke.usask.ca/~ladd/vet_libraries.html

Libraries and Archives

Index of links to universities and libraries worldwide as well as references to various directories.
http://www.uky.edu/Subject/libraries.html

Bookwire

Descriptive listing of US libraries alphabetically and by state, as well as an index of Asian, European, Canadian and special libraries.
http://www.bookwire.com/bookwire/libraries/libraries.html

List of Judaica Library Websites

Alphabetically sorted links to Jewish library websites.
http://www.angelfire.com/on2/smbergson/jlibraries.htm

US State Library Links

List of US libraries sorted alphabetically and by state.
http://www.angelfire.com/ks/windshipgenhelp/statelib.html

Bishop Library Index

Links to worldwide libraries, mostly with descriptions of the specific websites by Kenneth Bishop.
http://members.lycos.co.uk/kbishoplib/

Libraries & Archives

List of references structured by topics as internet and science libraries.
http://book-smith.tripod.com/bml-libraries.html

LibraryBug

Site offers data and facts on public libraries in the United States.
http://www.librarybug.org

Canadian Directory of Special Collections

Directory for these types of libraries in Canada. Contains the description and history of each collection.
http://www.collectionscanada.ca/collectionsp/index-e.html

Philadelphia Area Consortium of Special Collections Libraries

Includes links to member libraries, online exhibits, and catalogs.
http://www.pacscl.org/

Lii.org: Librarianship

Point of access for librarian-selected internet resources worldwide asorted by topics.
http://lii.org/search/file/libraries

Libweb

Searchable and categorized links to over 7,000 pages from libraries in over 100 countries, including academic, public and national libraries worldwide; library organizations and consortia; and related sites.
http://lists.webjunction.org/libweb/

Switzerland's Directory of Archives and Databases

Information on contents, location, contact, online catalogues, and the conditions of use of hundreds of databases, archives and libraries in Switzerland.
http://www.swissinfo.org/sen/swissinfo.html?siteSect=821&cat=20