KWin is a free and open source window manager and is the default in KDE. It is a powerful, highly customizable window manager with a plethora of both aesthetic and nuts and bolts features. With the release of KDE 4, the developers added 3D desktop effects, but they also carried over many customization features from KDE 3. Here are some of the window-specific settings that you can use in KWin.
Read the rest at MakeTechEasier