Since CL reminded me, I have been checking out the Project Gutenberg audio books. A friend's father can no longer see to read and this resource has brightened his days considerably! I prefer the human read audios, so that is what I've listed here. Formats include Ogg Vorbis, Apple iTunes, MP3 and Speex for most audio books.

Here's a link to the first page of listings. You can browse alphabetically by author, title and language.
[link to www.gutenberg.org]

These are a few we've recently downloaded.

Alexander the Great by Jacob Abbott
[link to www.gutenberg.org]

Treasure Island by Robert Louis Stevenson
[link to www.gutenberg.org]

The War of the Worlds by H. G. Wells
[link to www.gutenberg.org]

Beowulf
[link to www.gutenberg.org]

Andersen's Fairy Tales by H. C. Andersen
[link to www.gutenberg.org]

Tarzan of the Apes by Edgar Rice Burroughs
[link to www.gutenberg.org]

The Gods of Mars by Edgar Rice Burroughs
[link to www.gutenberg.org]

The Secret Garden by Frances Hodgson Burnett
[link to www.gutenberg.org]

Jane Eyre by Charlotte Brontë
[link to www.gutenberg.org]

Dorothy and the Wizard in Oz by L. Frank Baum
[link to www.gutenberg.org]

Pride and Prejudice by Jane Austen
[link to www.gutenberg.org]

Leaves of Grass by Walt Whitman
[link to www.gutenberg.org]