$\text{Ti}k\text{Z}$ is a $\LaTeX$ package for creating figures and diagrams that I've come to love over the years. Here are some of my favorite things I’ve made with this package. Feel free to ask for the source code, I'm happy to share!
Animation of the Hadamard gate on the Bloch sphere.
Cavendish experiment setup to measure gravity.
Atom in an optical cavity.
An analog clock. Inspired by the Hamilton Khaki Field Automatic watch.
A linearly polarized electromagnetic wave.