@Estrella HPI Hasso Plattner Institute has free online courses on IT and it has a good reputation, accreditation is not really a thing in Germany https://open.hpi.de/?locale=en . You could try courses on Big Data, that’s not just a hype but actually useful and employers acknowledge that.
I realize this is a far cry from my usual posts, but I'm desperately trying to find work, as I know are so many others. I don't have a wide range of interests, but anything that will make my CV more interesting is a plus, so I'm on the hunt for a potential list of free and accredited online courses. If anyone knows where I can find something like this, please please let me know. I'll do anything to fill my time if it feels within reach of my current skillset, and hopefully that skillset can slowly expand as a result.