Gnome

GNOME Control Center: The GNOME Control Center allows you to configure various parts of your system using a collection of tools called "capplets".
GNOME User's Guide: Usage and Setup of the GNOME desktop This is a guide regarding the GNOME desktop environment and its components. It covers usage and setup of the core GNOME programms.
Introduction to Gnome: This guide gives you a short introduction to Gnome. It is not intended to cover all details of Gnome