Baen Free Library
Read these science fiction selections online or download in a variety of formats from publisher Baen Books. Also read author Eric Flint's musings on open access and online piracy.
Biodiversity Heritage Library
The collection of a consortium of 12 natural history and botanical libraries, including digitized books and journals. Especially strong in 19th century writings. See BioStor (below) for additional searching options.
Search interface and tools for the Biodiversity Heritage Library (see above) and related resources.
An imprint of Utah State University Press. (Also check their Resources link for additional materials and sources.)
University of Michigan Press imprint for free digital editions concentrating in new media studies and digital humanities
Early Music Online
300 of the earliest surviving volumes of printed music, from the collections of the British Library
A listing of free collections of children's books
Free Medical Books | by Amedeo.com
Free medical textbooks from a variety of sources, many from medical schools and hospitals
HEARTH: Home Economics Archive: Research, Tradition, and History
Over 1,000 volumes on Home Economics from 1850-1950. Includes journal articles as well.
Literature for Children
A collection of children's books published in the U.S. and Great Britain roughly between 1850 and 1950.
DRM free, public domain (federal government) ebooks and reports from NASA on aeronautics, the history of the space program, space science, and more
Open Access Books | InTech
STM publisher of books and journals in biology, computer science, earth science, engineering, materials science, medicine, and technology
O'Reilly Open Books Project
Computer and technology related books from the publisher of the "animals" computer programming books.