Some fun things you can do with kernel modules (all "bad ideas")
This repo contains driver samples prepared for use with Microsoft Visual Studio and the Windows Driver Kit (WDK). It contains both Universal Windows Driver and desktop-only driver samples.
Kernel mode driver for reading/writing process memory. C/Win32.
AMDGPU Driver with KFD used by the ROCm project. Also contains the current Linux Kernel that matches this base driver
Cheat that uses a driver instead WinAPI for Reading / Writing memory.