LibriVox - free public domain audiobooks
Amazon Kindle - Amazon Kindle software lets you read ebooks on your Kindle, iPhone, iPad, PC, Mac, BlackBerry, and...
Audible - Audible is the world’s largest provider of premium audiobooks and spoken word content.
Google Play Books - Google Play Books lets you search, preview, and buy millions of books using Google Book Search.
Islamic Audiobooks Central - Listen to audiobooks about religion, spirituality and philosophy from the Islamic perspective.
Kindle Cloud Reader - Kindle Cloud Reader lets you read ebooks instantly in your web browser - no Kindle device required.