The KaOS Linux distro is a very efficient Linux distribution built around a refined KDE desktop environment that just keeps getting better. The KDE integration is more controlled than you’ll find in other Linux choices. I reviewed this distro last year, and I was impressed then with the solid performance of KaOS. I also liked how the community gave the KDE a tamer personality. The latest version takes it one big step further, adding a calming, cleaner look and feel to the user interface with KDE Plasma 5 as the default desktop.