- NUcat - Online catalog of Northwestern University libraries
- Kentucky Virtual Library - Online catalogs and databases, and access to Kentuckiana digitized collections. User ID and password required.
- Concordia University Libraries: CLUES Catalogue - Online catalog of Concordia University, Montreal, canada.
- OhioLINK - Shared catalog of the academic libraries of Ohio. Also provides access to databases and member information.
- Atrium - Online catalog of University of Montreal. English and French version.
- Smithsonian Libraries and Archives - Gateway to the collections of the Smithsonian Institute.
- CENTRA - Provides the online catalog for the Central Michigan University Libraries.
- Library of Congress Online Catalog - Online access to the collections resident at the Library of Congress.
- University of Tokyo OPAC - Online catalog (English version) of University of Tokyo
- ILLINET Online - Illinois statewide resource sharing system and union catalog.
- Worldcat - Meta search engine for online catalogs of libraries all over the world. Search for any book using a geographic location for the closest sources.
- Metro Boston Library Network - Online catalogs in Eastern Massachusetts.
- The CAT iLink at The Pennsylvania State University - Online catalog of Pennsylvania State University
- LibraryLink - Online union catalog of the various Filipiniana Libraries in the Philippines.
- MUSE - Online catalog of University of McGill, English and French version.
- Penelitian Hukum Indonesia - Online access to the Indonesian regulations collections at Penelitian Hukum Indonesia. User ID and password required.
- Iris - Online catalog of Qubec national library (BANQ)
- The International CIPAC List - Card-image public access catalogues (CIPACs) are online library catalogues based on databases of digitised catalogue cards and more or less sophisticated mechanisms for browsing or searching. This page offers links to all known catalogues of this kind, arranged by countries.
- Manitoba Legislative Library - Provides access to the holdings of Manitoba public libraries, for use as cataloguing source or to initiate interlibrary loans.