LibriVox - free public domain audiobooks
Audible - Audible is the world’s largest provider of premium audiobooks and spoken word content.
OverDrive Media Console - Download eBooks and audiobooks from your library directly to your iPhone, iPad, and iPod Touch!
Islamic Audiobooks Central - Listen to audiobooks about religion, spirituality and philosophy from the Islamic perspective.
Listen Audiobook Player - Feature rich and easy to use player for your audio books.
LearnOutLoud.com - LearnOutLoud.com is the web's largest resource for audio & video learning.