[tsingy]

https://fullstackopen.com/en/

[admissionsguy]

This is one of MOOCs offered by the University of Helsinki. There are more at https://mooc.fi. It also acts as a proper, credit-bearing university course. It is the best thing socialism has ever produced.

[satvikpendem]

Socialism is where workers control the means of production. I think you mean social policies, not actual socialism.

[__rito__]

The Soviets wrote some of the best Maths book, ever.