Lit2Go

http://etc.usf.edu/lit2go/books/

Riveted

http://rivetedlit.com/free-reads/

Gutenburg

http://www.gutenberg.org/

Many Books

http://manybooks.net/

Kindle

http://www.amazon.com/Best-Sellers-Kindle-Store/zgbs/digital-text/ref=zg_bs?_encoding=UTF8&tf=1

Smash Words

http://www.smashwords.com/shelves/home/3/free/any

World Book Day Audio Books

http://www.worldbookday.com/world-of-stories/​