Open Culture - Discover thousands of free online courses, audio books, movies, textbooks, eBooks, language lessons, and more.
Storynory - Storynory is another application that brings you wonderful audio stories weekly with beguiling voice of Natasha Gostwick.
LibriVox - free public domain audiobooks
Project Gutenberg - Project Gutenberg offers free ebooks to download.
Booksshouldbefree - Booksshouldbefree (also known as Loyal Books) is a free audiobook application that has more than 24000 free audiobooks and also regularly updates with latest trends.
Libro.fm - A digital audiobook platform for independent bookstores