ACM Digital Library 
http://portal.acm.org/dl.cfm?coll=portal&dl=ACM&CFID=2317827&CFTOKEN=84655475

African Digital Library
http://africaeducation.org/adl/

Alexandria Digital Library Project
http://www.alexandria.ucsb.edu/

Annotated Bibliography of Digital Library Related Sources
http://robotics.stanford.edu/users/ketchpel/annbib.html

Bartleby Project. Book on line
http://www.bartleby.com/

Biblioteca Basica Virtual en Ciencias Sociales de Argentina
http://www.bibliotecabasica.com.ar/

Biblioteca Digital Latinoamericana y Caribeña
http://bdigital.ucol.mx/

Biblioteca Digital Brasilera
http://www.ibict.br/

Biblioteca Digital Tarraconense, España
http://www.bibliodt.org/

Biblioteca digital Dioscórides de la Universidad Complutense de Madrid
http://www.ucm.es/BUCM/diosc/00.htm

Bibliotecas digitales en español
http://www.galeon.com/fernabriz_00/BibliotESP.htm

Biblioteca Eléctrica
http://www.elibrary.com/

Biblioteca Electrónica de Ciencia y Tecnología
http://www.biblioteca.secyt.gov.ar/

Biblioteca Electrónica de Lisieux
http://www.bmlisieux.com/

Biblioteca Electrónica Cristiana
http://www.multimedios.org/

Biblioteca en Línea
http://www.nl.gob.mx/creb/selecc/conecta.htm

Biblioteca Popular en Internet
http://www.arrakis.es/~margaix/index.html

Bibliotec@ VirtuART
http://biblioteca.8m.com/index1.htm

Biblioteca Virtual Agropecuaria
http://orton.catie.ac.cr/BVA.htm

Biblioteca Virtual Extremeña
http://www.unex.es/interzona/extremadura/

Biblioteca Virtual Miguel de Cervantes Saavedra
http://cervantesvirtual.com/

Biblioteca Virutal Universal de Argentina
http://www.biblioteca.org.ar/

BIBLIOMANIA
http://www.bibliomania.com/

La BitBlioteca
http://www.analitica.com/bitblio/bitblio.htm

The British Library Research and Innovation Centre Digital Library Research Programme
http://www.ukoln.ac.uk/services/bl/

Berkeley Digital Library Project
http://elib.cs.berkeley.edu/

Building Digital Collections : technical information and brackground papers
http://memory.loc.gov/ammem/ftpfiles.html

California Digital Library
http://www.cdlib.org/

CARRIE. An Electronic Library
http://www.ukans.edu/carrie/carrie_main.html

Ciberoteca
http://www.ciberoteca.com/

Ciber Reader. Virtual Libraries
http://www.abacon.com/cyber/public_html/Ch05.html

Center for the Study of Digital Libraries
http://csdl.cs.tamu.edu/

DLF. Digital Library Federation
http://www.diglib.org/dlfhomepage.htm

DelAWARE. The digital library
http://www.lib.de.us/index.shtml

DeweyWeb Library
http://www-personal.umich.edu/~jmillr/WWW-libraries.html

Digital libraries. Resource page
http://www.interlog.com/~klt/digital

Digital Libraries: Resources and Projects at IFLA
http://www.ifla.org/II/diglib.htm

Digital libraries : a selectec resource guide
http://www.lita.org/ital/1603_klemperer.htm

Digital Libraries at Xerox 
http://www.parc.xerox.com/istl/projects/dlib/

Digital Library Collection at the New York Public Library
http://digital.nypl.org/

Digital Library Projects
http://www.columbia.edu/cu/libraries/digital/

Digital Library Source Book
http://fox.cs.vt.edu/DLSB.html

Digital Library Information and Resources
http://www.canis.uiuc.edu/~bgross/dl/

Digital Library Initiatives at NCSU Libraries
http://www.lib.ncsu.edu/dli/index.html

Digital Library Resources at the Library of Congress of USA
http://lcweb.loc.gov/loc/ndlf/digital.html

Digital Library Federation
http://www.diglib.org/

Digital Library Information and Resources
http://www.canis.uiuc.edu/~bgross/dl/

Disa. Digital Imaging Project of South Africa
http://disa.nu.ac.za/

Gutenberg Project
http://www.gutenberg.net/

IDEAL. International Digital Electronic Access Library
http://www.idealibrary.com/servlet/useragent?func=showHome

InFoPeople Project
http://www.infopeople.org/

The Internet Archive: Building an Internet Library
http://www.archive.org/

Internet Public Library
http://www.ipl.org/

Library 2000. Project od the MIT laboratory for computer science
http://ltt-www.lcs.mit.edu/ltt-www/

Mozambook. La bibliotheque virtuelle, Francia
http://mozambook.free.fr/index2.htm

National Library of Canada Electronic Collection
http://collection.nlc-bnc.ca/

Online Library of Literature
http://www.literature.org/

Perseus digital library
http://www.perseus.tufts.edu/

Somerset County Library Sistem
http://somerset.lib.nj.us/virtlibrary.htm

Universal Library by Carnegie Mellon University
http://www.ul.cs.cmu.edu/

Virtual Library of Polish Literature
http://cogito.univ.gda.pl/biblioteka/Wsieci/zulu/zasada.htm

Victoria's Virtual Library
http://www.ul.cs.cmu.edu/

The WWW Virtual Library
http://vlib.org/Overview.html