Radial Basis Function Networks are not talked about a lot these days, but they are very interesting and useful.

Handwriting demo: http://macheads101.com/demos/handwrit...

Resizing images with RBF networks: https://github.com/unixpickle/rbfscal...

Distance formula in kNN video:    • Machine Learning with k-Nearest Neigh...  

Linear neurons:    • Neural Networks (Part 1)  

Neural net training:    • Neural Networks (Part 2) - Training  

Code to generate diagrams: https://gist.github.com/unixpickle/35...