There's also window snapping, which SDesk does well. Most Linux desktops have this feature, but some limit the basic configuration to half of the display. SDesk takes this a step further and allows ...
KDE Plasma 6.6 also allows you to customize SDDM, and once you've made any changes to your KDE Plasma desktop theme, you can then apply them to the login screen. To apply those changes, go to Colors & ...