TL;DR: A large bank of online courses from Harvard University are available to take for free on edX.

The certificate will be emailed as a PDF attachment. Certificates of attendance are provided free of charge. Please allow up to three business days for processing. Please complete this form to request ...

besides the fact that you won't get a certificate of completion with these free courses. But don't let that hold you back.

These are the best free online courses from Harvard University this month: These free courses don't include a certificate of ...