LibDex  
   Directory of libraries with web pages. Links to each library's home page, and to its catalog if that's on the Web too. Browse by country, or search by name.
   http://www.libdex.com/

Libweb  
   A global directory of library home pages.
   http://sunsite.berkeley.edu/Libweb/

Guide to Library Research  
   Offers tips for choosing a topic, finding background information, selecting and evaluating resources, searching for information, and citing sources. From Duke University Libraries.
   http://www.lib.duke.edu/libguide/home.htm

School Libraries on the Web  
   A directory of web pages maintained by K-12 school libraries in the United States and around the world.
   http://www.sldirectory.com/index.html

LibrarySpot.com  
   Directory of web sites, arranged by type of library.
   http://www.libraryspot.com/libraries/

Find Your Library  
   A directory of public libraries in the United States. Designed to be used by students.
   http://nces.ed.gov/nceskids/library/