The Metacity Window Manager
A simple GTK+ window manager that tries not to get in your way.
A window manager for GNOME, with a focus on simplicity and usability
rather than novelties or gimmicks. It uses GTK+ 2 for drawing window frames,
so that it inherits colours, fonts, and so on from the GTK+ theme. Its author
has characterised it as a "boring window manager for the adult in you.
Many window managers are like Marshmallow Froot Loops; Metacity is like Cheerios."