Window Manager

Tiling window manager is a window manager with an organization of the screen into mutually non-overlapping frames.

 awesome

Stacking window manager is a window manager that draws all windows in a specific order, allowing them to overlap, using a technique called painter's algorithm.

FVWM

Compositing window manager differentiate from other window managers is that instead of outputting to a common screen, programs each output first to a separate and independent buffer, or temporary location inside the computer, where they can be manipulated before they are shown.

 Compiz

Reference

• http://en.wikipedia.org/wiki/Compositing_window_manager
• http://en.wikipedia.org/wiki/Tiling_window_manager
• http://en.wikipedia.org/wiki/Stacking_window_manager
• http://en.wikipedia.org/wiki/Comparison_of_X_window_managers