IceWM is a window-manager for the X Window System. IceWM's goal is to be fast, simple, and not get in the way of the user. It has a taskbar that includes a pager and global and window-specific keybindings, as well as a dynamic menu. Keyboard and mouse can be used to manage application windows. Windows can be iconified on the taskbar, the tray, the desktop, or hidden. You can control them by using the Alt+Tab quick switch window and a list of windows. Menu-selectable focus models include a few configurable options. RandR and Xinerama support setups with multiple monitors. IceWM is well documented, highly configurable, and themeable. It includes a simple session manager and a system-tray, as well as an external background wallpaper manager that supports transparency.