Here are some of the most substantial online libraries either specializing in free online classics translated into English, or offering an even more comprehensive collection that includes the classics. THOUSANDS OF BOOKS for your reading pleasure....
 

Classics

Online Medieval and Classical Library (OMACL)
http://sunsite.berkeley.edu/OMACL/
A collection of English translations of hundreds of important Classical and Medieval literary works.

Internet Classics Archive (Tech Classics )
http://classics.mit.edu/
Several hundred translated texts from 17 different Greek and Latin authors in HTML  format. 

Books.com  Greek and Roman Texts Online
http://www.books.com/scripts/lib.exe?sid~ChADoU19xB11kL7/file~greek.htm
Links to hundreds of online classical texts by 22 authors.

Diotima Anthology of Translated Materials
http://www.uky.edu/ArtsSciences/Classics/anthology.html

Electronic Resources for Classicists
http://www.tlg.uci.edu/~tlg/index/about.html

Wiretap Gopher Library
http://wiretap.spies.com/Gopher/Library/Classic/
Electronic versions of several hundred classical texts. 

Orb Library
http://orb.rhodes.edu/library.html

Library of Congress Greek and Roman Classics
http://lcweb.loc.gov/global/classics/clastexts.html

Perseus Texts
http://www.perseus.tufts.edu/Texts/dump_TOC.html
http://www.perseus.tufts.edu/Texts/chunk_TOC.html
English translations, 3 dozens classical authors. Part of Tufts enormous searchable database of the ancient world.

CCAT Classical Archives
gopher://ccat.sas.upenn.edu:3333/11/Classical
Small collection of classical texts including Homeric, Aeneid and Sophocles.

Link Pages on the Classics

Internet Resources for Classicists
http://www.sms-va.com/mdl-indx/internet.htm

Medea Ancient Greek Links
http://www.showgate.com/medea/grklink.html

Classics Links at U.Michigan
http://rome.classics.lsa.umich.edu/welcome.html

Classics Etexts
http://pomoerium.com/links/texts.htm

Ancient History Online Texts
http://www.fordham.edu/halsall/ancient/asbook.html#Online Collections

Online Books Page Classics
http://www-cgi.cs.cmu.edu/cgi-bin/book/subjectstart?PA

Diotima
http://www.uky.edu/ArtsSciences/Classics/gender.html

Folklore and Mythology Electronic Texts
http://www.pitt.edu/~dash/folktexts.html

General Myths, Regional Myths
http://pibweb.it.nwu.edu/~pib/mythgene.htm
http://pibweb.it.nwu.edu/~pib/mythregi.htm

Myth and Legends (Princeton)
http://pubpages.unh.edu/~cbsiren/myth.html

MythLink
http://www.freenet.msp.mn.us/org/mythos/mythos.www/MLINKS.HTML

Voice of the Shuttle Classical and Etext  Links
http://humanitas.ucsb.edu/shuttle/classics.html

Classics EPublications and Journals
http://www.tlg.uci.edu/~tlg/index/publications.html

Search Argos: Ancient/Medieval Search Engine
http://argos.evansville.edu/
 

Online Books page
http://www.cs.cmu.edu/books.html

Project Gutenberg
http://www.gutenberg.net/_titles/_A_index.html
Books whose copyright has expired, converted into text files.

Electronic Text Center
http://etext.lib.virginia.edu/english.html
Electronic Text library at the University of Virginia, most but not all accessible to the general public.

English Server
http://eserver.org/
Carnegie-Mellon's online collection of 20,000 texts.

Internet Public Library Online Texts Collection
http://www.ipl.org/reading/books/
Over 7700 online titles.

Great Books Index
http://books.mirror.org/gb.titles.html
Includes hundreds of online classics

Oxford Text Archive
http://ota.ahds.ac.uk/index.html
http://firth.natcorp.ox.ac.uk/ota/public/index.shtml
Several thousands mostly free electronic texts in several languages.

Carrie Electronic Text Library
http://kuhttp.cc.ukans.edu/carrie/stacks/stacks_main.html

Athena: The Internet  Library
http://un2sg4.unige.ch/athena/html/authors.html
Links to electronic and downloadable versions of texts arranged in alphabetical order by author and title. Links to other e-text archives. 

Books.com Electronic Library
http://www.books.com/scripts/lib.exe

Gopher at Virginia Tech
gopher://gopher.vt.edu:10010/10/33
The Eris Project from Virginia Tech's electronic text versions of major works of literature, accessible via gopher.

CCAT Text Library (gopher)
gopher://ccat.sas.upenn.edu:70/11/Archive
Small collection of online texts at U. of Pennsylvania.

More Link Pages to Electronic Texts
Electronic Text services
http://www.columbia.edu/cu/libraries/indiv/ets/offsite.html

Ceth's Directory of Electronic Text Centers
http://www.ceth.rutgers.edu/informationServices/ectrdir.html

Digital Librarian Electronic Texts
http://www.servtech.com/~mvail/electronic.html

Electronic Text Collections
http://history.hanover.edu/etexts.html

Electronic Text Center Links
http://www.lib.utk.edu/text/#Catalogs

Etext Links
http://www.tlg.uci.edu/~tlg/index/texts.html

Electronic Text Repositories
http://www.indiana.edu/~letrs/related-links/index.html

Library of Congress Etext Links
http://lcweb.loc.gov/global/etext/etext.html

University of Wellington Etext  Links
http://www.vuw.ac.nz/classics/texts.html

Alex Electronic Texts: English Literature and Philosophy
http://sunsite.berkeley.edu/alex/

Project Bartleby http://www.cc.columbia.edu/acis/bartleby/

More listings at Windweaver  http://www.windweaver.com
Electronic Texts   http://www.windweaver.com/searchpage1.htm
Libraries  http://www.windweaver.com/searchlibraries.htm
 

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