Books Should Be Free Audio books on fantasy tales, mystery, epic, humor, medicine, science, religion, etc.
Free Classic Audio Books Classical titles by authors such as Jane Austen, Mark Twain, William Shakespeare, etc.
LibriVox Books in the public domain in the Unites States. "Public Domain' means they are no longer covered by copyright, and anyone can use the texts as they wish.
Lit2Go This collection consists of children's literature that is a part of the Educational Technology Clearinghouse and is funded by a grant from the Florida Department of Education, Bureau of Instruction and Innovation. It's copyright by Florida Center for Intructional Technology.
Thought Audio Audio books on bibliography, philosophy, religion, literature and so forth.