Introduction to Machine Learning
I think this is an instance where HN's rigid title policy is a negative. It took me a minute to realize why this page, ostensibly a syllabus page for a university course, is relevant to a general tech audience. You have to scroll down past three subsections to "Resources" to realize that all of the lecture slides and problem sets, as well as videos of the lectures, are available for free. I just hope people aren't missing out on this great resource because the title can't be editorialized.