American Verse Project
http://www.hti.umich.edu/english/amverse/
120 volumes of American verse prior to 1920.
Bartleby.com
http://www.bartleby.com/
Full text reference, verse, quotations, fiction and nonfiction books available for free. Includes a poetry index of first lines.
The English Server
http://eserver.org/
More than 20,000 texts in the humanities plus links to associated sites. Searchable and browsable.
Guide to Grammar and Writing
http://www.ccc.commnet.edu/grammar/
Answer all of your questions about writing including parts of speech, sentence and paragraph construction, and developing research papers. Includes sentence diagramming!
Internet Public Library Online Texts Collection
http://www.ipl.org/div/subject/browse/hum60.60.00/
Searchable directory of online texts.
Internet Shakespeare
http://ise.uvic.ca/
This award-winning site offers well-researched historical information, old spelling full texts of Shakespeare's works, and literary criticism form around the world.
The Phrase Finder
http://www.phrases.org.uk/
Find the meanings and origins of more than 2000 English sayings and idioms.
Project Gutenberg
http://www.gutenberg.org/catalog/
Over 13,000 books available online.
Biographies
http://www.biography.com/
A& E site with a search engine to look up famous biographies