I’ve mentioned Microsoft Virtual Academy before as a great resource for free online courses. As it is a Microsoft site the courses are either on Microsoft products or are presented with a Microsoft slant. There are even a few Python ones on there.
Microsoft has now also launched Microsoft Learning, with Open edX based courses (the same technology used to provide the Mongo University). At present there are only Azure courses on there, we’ll see if Microsoft keep it that way or add additional courses for other technologies over time. If you want to quickly learn about Microsoft’s cloud platform the courses appear clear and concise from bits I’ve done so far.