Audio Books for Free Mostly at a cost. MP3 downloads of hundreds of books are available in poor quality and multiple files free. Better quality and one file is much more expensive!
Free Classic Audio Books Human narrated free audio books (and ones to purchase.)
LibriVox Free on-line, human-narrated audio books.
Radio Lovers Listen to old-time radio shows on-line.
Reading Well Children's Books Audio Presentations. Has a number of the Landmark series history books read aloud.