LibriVox - free public domain audiobooks
Tellico - Tellico is a KDE application for organizing your collections.
Audible - Audible is the world’s largest provider of premium audiobooks and spoken word content.
Delicious Library - Delicious Library 3: Catalog your books, movies, music, software, toys, tools, electronics, & video games. Archive your life.
Mobilism.org - A home for book lovers, app enthusiasts, and much more.
BookPedia - Whether books line every wall of your house or barely fill one shelf, Bookpedia is the perfect...