Lifehacker has put together a curriculum of some of the best free online college-level classes available on the web.
Categories include Computer Science and Technology, Finance and Economics, Science and Medicine, Mathematics, Social Sciences Classics and Humanities, and Law.
OpenStax, based at Rice University, publishes high-quality, peer-reviewed, openly licensed college textbooks that are absolutely free online and low cost in print.
The Khan Academy, founded by educator Salman Khan, supplies a free online collection of more than 4,000 micro lectures teaching mathematics, history, healthcare, medicine, finance, physics, chemistry, biology, astronomy, economics, cosmology, organic chemistry, American civics, art history, macroeconomics, microeconomics, and computer science.
Udacity offers accessible, affordable, engaging classes that anyone can take, anytime with a mission to bring accessible, affordable, engaging, and highly effective higher education to the world.
Udacity is the outgrowth of free computer science classes offered in 2011 through Stanford University.
Worldwide learning network of shared teaching and learning materials made freely available online.