That's...everything that I program that isn't part of my job. A near-universal trait of my hobby projects is that they're basically things that I don't think I could sell. The two that I've put the most time into over the years are an NES emulator and an attempted reimplementation of the Ultima Underworld game engine.
There are also things like a C++ port of some Python code to control a PWM-generating chip (inside the skeletal codebase that will eventually control a quadrupedal robot), and a collection of utilities that mostly have to do with things related to DOS-era games.
There are also things like a C++ port of some Python code to control a PWM-generating chip (inside the skeletal codebase that will eventually control a quadrupedal robot), and a collection of utilities that mostly have to do with things related to DOS-era games.