1. A tool for changing the desktop background image in X11 A GTK+ based program that lets you periodically change your X desktop. It has several random effects, a slideshow, and and may act as a xscreensaver hack or as a standalone screensaver. From Debian 3.0r0 APT

2. ChBg is for changing desktop backgrounds in a given period. It can render images with 10 modes (such as tiled, centered, scaled, etc.). It uses Imlib1, Imlib2, or gdk_pixbuf for loading images, so it supports many image formats. This version uses gdk-pixbuf. ChBg has a windowed setup program, is able to load setup files, can be used as slideshow picture previewer in its own window or as adesktop background, and can be used as screensaver or as an xscreensaverhack. It has a dialog for fast previewing of pictures and very usablethumbnail previews. From Mandrake 9.0 RPM