Oxford Text Archive
  http://ota.ahds.ac.uk/

 

OFCN Electronic Bookshelf  http://www.ofcn.org/cyber.serv/resource/bookshelf/

 

Bibliomania
  http://www.bibliomania.com

 

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

 

Bartleby Archive
  http://www.bartleby.com

 

Library of Congress

  https://www.loc.gov/collections/

 

The Internet Classic Archive
  http://classics.mit.edu/index.html