Free eBooks available to download

AthenaMainly French and Swiss authors and documents. Nearly 10,000 links to books on philosophy, science, classics, literature, history, economics, etc. Multilingual.
Cornell University Library eBooksFree access to over 70,000 full text electronic books from the holdings of the libraries of Cornell University.
DOAB: Directory of Open Access BooksOver 1200 academic peer-reviewed books from 33 publishers
EuropeanaOut of copyright books from European research libraries.
Google Book SearchSearch for the full text of books.
Inter-Disciplinary Press eBooksAccess to a growing collection of this publisher’s free eBooks.
International Deveolpment Research Centre (IDRC) eBooksThis site provides information, and in many instances free full text access, to books published by the International Development Research Centre (IDRC) which is a Canadian Crown corporation .
Internet ArchiveeBooks available from international libraries open-access archives.
OAPEN LibraryOpen access academic books in the humanities and social sciences.
Oxford Text ArchiveThousands of titles in over 25 different languages.
Project GutenbergOver 36,000 titles, in several languages and different eBook formats.

Free eBooks that can be read online

Alex Catalogue of Electronic textsA collection of public domain documents from American and English literature as well as Western philosophy.
BibliomaniaMore than 2000 free texts, study guides and reference resources in novels, poetry and biograhies.
NCBI BookshelfA growing collection of online biomedical textbooks made available by the (US) National Centre for Biotechnology Information.
Online Literature LibraryClassic works of literature
Page by Page BooksHundreds of classic books in literature and history.
Project BartlebyLiterature, reference and poetry.
Universal LibraryTitles in all subjects, hosted by the Carnegie Mellon University.