Yes! From their website,  "At Harvard Extension School, free and open learning is hardly a new concept. In fact, the Extension School was founded with this mission in mind: to create an affordable way for any motivated student to take courses at Harvard. We stay true to this mission today, offering several free courses and nearly 800 for-credit courses at reasonable tuition rates." If you are interested, you can go to https://www.extension.harvard.edu/open-learning-initiative. Hope you find something that you like and join thousands of others!! :)