Project Gutenberg
– A huge archive of free etexts of works that are in the public domain in the U.S.A. Text listings, search engine, newsletter, articles and information on how to help creating more etexts.
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Distributed Proofreaders Europe – Same as Distributed Proofreaders but focused on works in European languages other than English and on works that are in the public domain in Europe.
Project Gutenberg Consortia Center – A directory of public domain etext collections with search engine. By Project Gutenberg founder Michael Hart.
Project Gutenberg of Australia – Archive of free etexts of works that are in the public domain in Australia. Australian writers. Thematic book listings.