FVWM stands for "F Virtual Window Manager" (The F currently has no official meaning). It is a window manager for the X Window System. It was based on TWM (Tabbed Window Manager), but added support for Virtual Screens, making it more powerful. FVWM has evolved into a highly configurable environment for Unix-like systems.
Please only submit site relating to FVWM, FVWM2, FVWM95 and their derivatives.
IceWM is a window manager for the X Window System. It is relatively lightweight in terms of memory and CPU usage, and comes with themes that allow it to imitate several graphical user interfaces. IceWM is a "stacking window manager" (also called "floating window manager"), drawing all windows in a specific order, allowing them to overlap.
Window Maker is a window manager for the X Window System. It is designed to emulate NeXTstep GUI. Window Maker is considered to be fast, efficient and stable.