Harvard University Free Courses

What are the free courses offered by Harvard University? What qualification is required for applying for its free courses?

Harvard University Extension School free online courses

Harvard University Extension School is offering a selection of free online courses. These free online courses are open to everyone (not just Harvard students). These are among the best free online courses we have seen. Each online video class is a series of online videos. Harvard University will not give any course credit, or any online diploma for completing these free online courses. However, you will attain knowledge on these courses.That's its own reward. These free online classes are:
• Intensive Introduction to Computer Science
• The Heroic and the Anti-Heroic in Classical Greek Civilization
• Bits: The Computer Science of Digital Information
• Shakespeare After All
• China: Traditions and Transformations
• World War and Society in the Twentieth Century: World War II
• Sets, Counting, and Probability
• Abstract Algebra