- Canadian Directory of Special Collections
- Directory for these types of libraries in Canada. Contains the description and history of each collection.
- Multilingual database of international standard book numbers. Offers the possibility to investigate by category.
- Law Libraries Worldwide
- Chan Robles and Associates provides links to major law libraries around the world.
- Lib Web Cats
- Searchable database of over 5,000 library sites worldwide. Listings include mailing addresses and links to online catalogs.
- 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.
- 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.