Interactive demonstrations for ML courses

Machine learning becomes more and more popular, and there are now many demonstrations available over the internet which help to demonstrate some ideas about algorithms in a more vivid way. There are certain arguments against having courses overloaded with interactive things since those frequently prevent students from diving into mathematics beyond machine learning, but generally I consider demonstrations helpful. ROC curve is fairly simple subject, but having a demo is nice way to demonstrate some important limit cases. I have prepared simple html demo for this. There are also other interesting demonstrations like t-SNE and RNNs, you're welcome to check Andrej's github page.