Tellico - Tellico is a KDE application for organizing your collections.
LibriVox - free public domain audiobooks
Delicious Library - Delicious Library 3: Catalog your books, movies, music, software, toys, tools, electronics, & video games. Archive your life.
DigitalBook.io - Free audio books and eBooks. Search, browse, listen, read and download over 100,000 free audio books and eBooks.
BookPedia - Whether books line every wall of your house or barely fill one shelf, Bookpedia is the perfect...
Downpour.com - Listen to high quality audiobooks instantly. Download audiobooks to your iPhone, Android, or other listening device. Find titles including best-sellers and new releases. Downpour, where content reigns.