Microsoft's own free hub linking every official tutorial, video series and learning path for C#.
Machine Learning for Inverse Graphics
Numerical Computation for Mechanical Engineers
Practical Information Technology Management
Behavior of Algorithms
Combinatorial Optimization
Topics in Mathematics of Data Science
Elliptic Curves
Algorithms, Part I
The Polynomial Method
Combinatorial Analysis
Computer Games and Simulations for Education and Exploration
High-Dimensional Statistics