OpenBox is a highly configurable, next generation window manager with extensive standards support. It is used as default in Puppy5.2x Lucid, but JWM can be used instead via WMSwitcher. See LupufySlacko to add OpenBox to Puppy 5.3x Slacko.

Also see OpenboxExtra packaged by vicmz. It include Tint (panel) and themes.

OpenBox can have a nice translucent dock and its keyboard and mouse bindings can be configured. Mouse bindings can be important as some applications shortcut key conflict with the standard Linux ones, for example Inkscape.

Use "Openbox config" and "Fbpanel configuration"

OpenBoxExtra - Openbox packaged with Tint, themes and more
LupufySlacko - Get OpenBox for Puppy 5.3x Slacko
WMSwitcher - change window manager.
JWM

Openbox/Fbpanel, How to set it all up.
Openbox Window Manager thread
Openbox homepage
How to disable/config alt-click-move in OpenBox (handy for Inkscape)