The Window Manager is the layer between X windows and the DesktopEnvironments desktop environment. Window managers (WM) control the placement & appearance of windows. The default in Puppy is JWM is very light and basic but effective. If you imagine a computer system as a series of layers it would look something like this:

Hardware < Operating System < Window System < Window Manager < Desktop Environment

for Puppy the default is JWM or OpenBox:

Hardware < Linux < X Windows < JWM or OpenBox

(JWM or OpenBox also act as the Desktop Environment.)

JWM - default in Puppy4, also see JWMElements.

OpenBox - default in Puppy5Index Puppy 5.2x Lucid, not included in Puppy 5.3x Slacko.

Afterstep - Afterstep forum page

Antico - ANTICO forum page

Beryl - has special effects

Compiz - has special effects

CompizFusion Compiz-Fusion - has special effects

Dwm - Dwm forum page

Enlightenment - Used by MacPup

Fluxbox - Fluxbox forum page

Flwm - Flwm forum page

IceWM- Easy to use, customizable and good looking window manager.

Metisse - has special effects

ProjectLookingGlass Project Looking Glass - has special effects

RatpoisonWM - minimalist with the emphasis on speed

XFWM - has special effects

JWMElements JWM's elements

WMSwitcher Window Manager Switcher

ChangeWindowManager How to Change Window Manager

WindowManagersEffects Window Managers with Special Effects

DesktopEnvironments Desktop Environments

WikiPedia:Window_manager

List of window managers