WMLive CD -- A remastered Ubuntu live CD featuring Window Maker as default window manager.
WINGs tutorial
Unofficial debian packages of Window Maker
Themes for Window Maker
WINGs manpages
WDM -- A login manager
Source code of www.windowmaker.org
OPENSTEP 4.0 Demo on youtube
Why I use Window Maker (blog post)
My Window Maker 'desktop' configuration (blog post)