Nitrogen is a background browser and setter for X windows. - Multihead and Xinerama aware - Recall mode to be used via startup script - Uses freedesktop.org standard for thumbnails - Can set Gnome background - Command line set modes for script use - Inofify monitoring of browse directory - Lazy loading of thumbnails conserves memory - Can automatically determine best image mode (centered, scaled, or tiled) This requires gtkmm.