As you may already know, Coursera, Udacity and EdX have free courses as well as paid courses (which are basically the free ones with a certificate of completion).
My question is, when I complete a free course, is it appropriate to put it on my resume? There is no "certified" way of checking the completion, but I have the knowledge. Or, is it just better to list the acquired skills under the skills list section, and not write anything about the course?
I've read these other questions (1, and 2) about including MOOC(Massive Open Online Course) courses on your resume. However, Coursera has changed its model and do not offer certificates for free courses anymore. So these questions are no longer applicable (at least for Coursera).