FreeScience.info
Free science books for everybody
Wikibooks
Free library of educational textbooks that anyone can edit
Textbook Revolution
Dedicated to increasing the use of free educational materials by teachers and professors
The Assayer
Catalog of books whose authors have made them available for free
BookBoon.com: Textbooks
Online textbooks for students in PDF format
Textbooks in Mathematics
A list of links to useful mathematical textbooks available for free on the Internet.
PlanetMath Books
Math for the people, by the people.
Ludwig von Mises Institute: Literature
Online offering of the literature of the Austrian School and libertarian ideas
IN-TECH
Books covering fields of Artificial Intelligence, Manufacturing, Robotics and Operations Research.
Free Books 4 Doctors
Promoting free access to medical books
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