Open textbook lists
Please add any listings of existing freely accessible online textbooks here.
Alex Stefanov's Textbooks in Mathematics
George Cain's Online Mathematics Textbooks
Viawiki Globaltext project
Student Book's Free Online Medical Textbooks page
A list of Free Medical Books at Universidade Federal de São Paulo
Dennie Van Tassel's History of Computer Programming Language Statements
The Student PIRGs' List of Open Textbooks
Open Textbooks on MERLOT