OpenStep Specification: published by NeXT Computer, Inc.
Window Managers for X: Window Maker: Window Maker page from a guide to window managers and desktops for the X Window System and Linux/UNIX.
wmaker@orcon: Window Maker for users of Linux/BSD and other UNIXes. Provides news on both Window Maker and the general open-source/free UNIX community (e.g., Linux and FreeBSD kernel updates, new Mozilla releases), software and theme downloads, help resources, and links.
wmakerconf: A GTK+ based configuration tool for Window Maker window manager.