Public Free Library

freely available books and other full texts on the web that require no payment, signing up, or permissions of any kind to read; most of which can be easily downloaded or printed for reading offline

A popular government without popular information, or the means of acquiring it, is but a prologue to a farce or a tragedy, or perhaps both.
                                                -- James Madison

Information is the currency of democracy.
                                                -- Thomas Jefferson

Rare Book Room:
    Library of Congress: American Memory
    British Library Online Gallery
    Massachussetts Historical Society Collections Online
    Thomas Jefferson Digital Collection
        (other links to Jefferson papers here)
    Darwin Papers & Manuscripts
    British Library Treasures in Full: Shakespeare in Quarto
    The Life and Opinions of Tristram Shandy, Gentleman
    A Few Days in Athens by Frances Wright (1822)
    The Star Amateur Electrician (c.1910-1920)
    Le Clef de l'Occultisme by Horus (1922) (in French)

Main Stacks:
    Project Gutenberg catalog
    Hathi Trust
    University of Virginia Scholar's Lab: Digital Resources
    The Online Books Page
    Open Library
    Digital Public Library of America
    The Public Domain Review
    Arthur's Classic Novels A Free Website for Periodicals, Books, and Videos
    Biblioteca Virtual Miguel de Cervantes
    PLoS (Public Library of Science)
    Eighteenth-Century E-Texts
    A digital library of 18th and 19th Century journals
        Online Parallel Study Bibles
    Internet Sacred Text Archive
    other online lists of reading matter (incl. some commercial sites)

Music Room:
    Historic American Sheet Music
    Popular Songs in American History
    Public Domain Music (MIDI files)
    Cylinder Preservation and Digitization Project
    Tunes at Ceolas
    County Champaign Irish Tune Collections Online
    Capt. O'Neill's Irish tune collections (sheet music & MIDI files)
    Richard Robinson's Tunebook
    The Public Domain Review

Art Exhibit:
    Wikimedia Commons
    The Public Domain Review

Computer Room:
    Info on the 'Net


Library Locations:
    Public Libraries in the United States
    Lib-Web-Cats: A directory of libraries throughout the world (use search; browse doesn't work well)