I learned the Neataptic neural network library and gained experience in text classification using an artificial neural network.

I learned the D3.js charting library.

I learned the express-session NPM package and gained the capability to implement user accounts and HTTP-based user sessions.

I learned SQLite for creating database subsystems for heavily constrained server environments such as the Orange Pi Zero single board computer.

I learned the Blender 3D modeling and animation utility and obtained the capability to create basic 3D models and animations.

I learned the Babylon.js 3D game development framework and obtained the ability to make 3D browser games.