How to manage third-party app windows in Linux?

I want to manipulate the windows on a user's desktop. For example moving a window to a new position, or getting a list of all windows and their titles. I'm looking for the Linux-equivalent of win32's [winuser.h](https://learn.microsoft.com/en-au/windows/win32/api/_winmsg/) and macOS's [Quartz Window Services](https://developer.apple.com/documentation/coregraphics/quartz_window_services?language=objc) .