The International Federation of Library Associations: http://www.ifla.org/
Internet Public Library: http://www.ipl.org/
The Electronic Library: http://www.theeuropeanlibrary.org/tel4/
The Electronic Libraries Programme: http://www.ukoln.ac.uk/services/elib/
M25 Consortium of Higher Education Libraries: http://www.m25lib.ac.uk/
Bath Information and Data Service: http://www.bids.ac.uk/
COPAC: http://copac.jisc.ac.uk/
Project EARL - Electronic Access to Resources in Libraries: http://www.earl.org.uk/
RLG - The Research Libraries Group: http://www.oclc.org/en-europe/home.html
UKOLN WWW service: http://www.ukoln.ac.uk/
Europeana: https://www.pinterest.com/europeana/
The www Virtual Library: http://vlib.org/
Nacionalna i univerzitetska biblioteka "Sv. Kliment Ohridski" Skopje: http://www.vbm.mk/cobiss/
Univerzitetska biblioteka "Svetozar Markovic" Beograd: http://www.unilib.rs/
Nacionalna i sveucilisna knjiznica, Zagreb: http://www.nsk.hr/
Narodna in univerzitetna knjiznica, Ljubljana: http://www.nuk.uni-lj.si/
National and University Library of RS: http://nub.rs/pocetna/
University of London Library: http://www.ull.ac.uk/
Oxford Libraries http://solo.bodleian.ox.ac.uk/primo_library/libweb
Harvard University Library: http://library.harvard.edu/
Yale University Library: http://web.library.yale.edu/
Stanford University Library: http://library.stanford.edu/
University of California-Berkeley: http://www.lib.berkeley.edu/node
University of California-Los Angeles Library: http://www.library.ucla.edu/
University of Illinois-Urbana Library: http://www.library.illinois.edu/
University of Michigan Library: http://www.lib.umich.edu/
UCLA Home Page: http://www.ucla.edu/
British Library: http://www.bl.uk/
Bibliotheque national de France: http://www.bnf.fr/fr/acc/x.accueil.html
National Library of Scotland: http://www.nls.uk/
Queen's Borough Public Library: http://www.queenslibrary.org/
The Library of Congress: http://www.loc.gov/
National Library of Canada: http://www.nlc-bnc.ca/
Dalnevostochhnaya Gosudartvennaya Biblioteka: http://www.fessl.ru/
National Library of Czech Republic: http://www.nkp.cz/
The National Library of Australia: http://www.nla.gov.au/
National Library of New Zealand: http://natlib.govt.nz/
Multnonah County Library: https://multcolib.org/
London Libraries: http://www.londonlibrary.co.uk/
The New York Public Library: http://www.nypl.org/
University of Toronto Libraries: https://onesearch.library.utoronto.ca/
County of Los Angeles Public Library: http://www.colapublib.org/
Chicago Public Library: http://www.chipublib.org/