- Feedbooks (eBooks)
- Hathi Trust Digital Library (eBooks) – HathiTrust is a partnership of academic & research institutions, offering a collection of millions of titles digitized from libraries around the world.
- International Children’s Digital Library Foundation (eBooks) – The ICDL Foundation promotes tolerance and respect for diverse cultures by providing access to the best of children’s literature from around the world.
- Librivox (eAudio) – LibriVox volunteers record chapters of books in the public domain and release the audio files back onto the net. Our goal is to make all public domain books available as free audio books.
- Open Culture – Open Culture brings together high-quality cultural & educational media for the worldwide lifelong learning community, including thousands of free online courses, books and movies.
- Project Gutenberg (eBooks/eAudio) – Project Gutenberg offers over 42,000 free ebooks: choose among free epub books, free kindle books, download them or read them online.
- Public Books – Public Books unites the best of the university with the openness of the internet.
- The Universal Digital Library – Million Book Collection