The Official GNOME development Manual
- This is the entire GTK+/Gnome Application Development manual. It is available online in its entirity and is always up to date.
- http://developer.gnome.org/doc/GGAD/

Interface Design - Menubars
- Article - from a UI Design Perspective - about configuring Gnome to use a Single Context-sensitive Menubar, instead of multiple redundant (one per window) Menubars.
- http://home.earthlink.net/~johnrpenner/Articles/SingleMenubar.html