Free Audiobooks - Free Audiobooks is a digital audiobooks library app that comes up with an extensive collection of more than 14000 different audiobooks to help you in boosting up your knowledge right at your fingertips.
LibriVox - free public domain audiobooks
Listen to books for free - Listen to books for free is an app by Anyreads that allows users to listen to up to 7000 audiobooks right on their mobile phones.
Audible - Audible is the world’s largest provider of premium audiobooks and spoken word content.
AudioBookBinder - Got a lot of audiobooks in MP3 format and would like to listen them on your iPod?
Mobilism.org - A home for book lovers, app enthusiasts, and much more.