Bookboon's free online textbooks for students are focused and to the point. They are all written by highly respected professors from top universities in the world and cover topics such as economics, statistics, IT, engineering and natural science.
Cognitive Sciences Eprint Archive
An electronic archive for self-archive papers in any area of Psychology, Neuroscience, and Linguistics, and many areas of Computer Science (e.g., artificial intelligence, robotics, vison, learning, speech, neural networks), Philosophy (e.g., mind, language, knowledge, science, logic), Biology (e.g., ethology, behavioral ecology, sociobiology, behaviour genetics, evolutionary theory), Medicine (e.g., Psychiatry, Neurology, human genetics, Imaging), Anthropology (e.g., primatology, cognitive ethnology, archeology, paleontology), as well as any other portions of the physical, social and mathematical sciences that are pertinent to the study of cognition.
Open Access eBooks is an international publisher of eBooks. Open Access eBooks covers different disciplines of science, technology and medicine. Each eBook contains around 6 or 7 book chapters providing the latest information to the readers.
Project Gutenberg offers over 59,000 free eBooks. Choose among free epub and Kindle eBooks, download them or read them online. You will find the world's great literature here, with focus on older works for which U.S. copyright has expired. Thousands of volunteers digitized and diligently proofread the eBooks, for enjoyment and education.