http://www.gutenberg.org/
Welcome
Project Gutenberg offers over 38,000 free ebooks to download to your PC, Kindle, Android, iOS or other portable device. Choose between ePub, Kindle, HTML and simple text formats.
We carry high quality ebooks: All our ebooks were previously published by bona fide publishers. We digitized and diligently proofed them with the help of thousands of volunteers.
No fee or registration is required, but if you find Project Gutenberg useful, we kindly ask you to donate a small amount so we can buy and digitize more books. Other ways to help include digitizing more books, recording audio books, or reporting errors.
http://www.openculture.com/
About Us
Open Culture editor Dan Colman scours the web for the best educational media. He finds the free courses and audio books you need, the language lessons & movies you want, and plenty of enlightenment in between.
http://librivox.org/
LibriVox volunteers record chapters of books in the public domain and release the audio files back onto the net. Our goal is to make all public domain books available as free audio books.