It really everything is free here. Before it I used the other website, but it was too expensive, but edx is totally non-commerce organization. The education is free, but to get diploma you have to pay. Knowledge is the most important sure but also it worth to mention at your CV that you have degree.
This website has the best offer of computer science courses. Most courses are free, but you can get a verified certificate for some small amount. And yes, a certificate from this site helped me get an entry job. To all of you who are hesitating, I recommend you to start learning. You have nothing to lose.
Educational Site, The only emails you receive if your register an account are reminders of the online courses signed up for and notifications of new courses once in a month
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