Downloadable Audiobooks

Simply Audiobooks: Free Audio Downloads
Check out this web site for their monthly free download of a featured audiobook.

AudioBooksForFree.com
MP3, iPOD and DVD audiobooks (adventures, detectives, horrors, classics, children, non-fictions, philosophy, etc.) for you to download and enjoy. Every audio book produced and recorded by professional actors/narrators and experienced directors. No computerised text-to-voice convertions have been used.

Free Classic Audio Books: Digital Narration for the 21st Century 
The downloads are available in mp3 and in m4b audio book format for iTunes and the iPod. The adventure of using the iPod format is that it remembers where you stop in a file.

Free Titles from Leading Audiobooks
A wide variety of contemporary fiction titles for free download.

The Very Best of BBC Comedy
Now's your chance to sample the delights of the BBC comedy archives and it won't cost you a penny, a nickle, a cent, or whatever the currency is in your part of the world.
You'll find everything from The Goon Show through to Dead Ringers.

Project Gutenberg: Audio Book, Human-Read

Project Gutenberg: Audio Book, Computer Generated
There are over 25,000 free books in the Project Gutenberg Online Book Catalog.