Window manager and desktop environments. If you run a Unix-like desktop, you probably use them. Most people just use what comes with their distribution. They either run Cinnamon, GNOME or maybe even KDE/Plasma. That’s fine. But I am a tinkerer, and I’ll be damned if I won’t tinker. I do like KDE, but it is a big piece of bloat. So is GNOME. So is Cinnamon. Not that they are bad environments to work in, but they aren’t really efficient.