Offers over 10,000,000 fully accessible books and texts. There is also a collection of 300,000 modern eBooks that may be borrowed or downloaded by the print-disabled at OpenLibrary.org
A a volunteer driven, not-for-profit effort to produce a collection of high quality, carefully formatted, accessible, open source, and free public domain eBooks that meet or exceed the quality of commercially produced eBooks.
The LibriVox objective says it all: "To make all books in the public domain available, for free, in audio format on the internet." These books are narrated by non-professionals.