Five months after the previous 3.9 release, IceWM, a lightweight window manager for X Window System, favored for its minimal resource usage and high configurability, has released its latest version, 4.0.

The highlight of the release is a significantly enhanced Alt+Tab quick switch. The window switcher can now handle large numbers of open windows more efficiently, working smoothly in both horizontal and vertical layouts. Users can jump directly between application instances by typing the first letter of an application’s class name, select windows using number keys, or choose them with the mouse when using the horizontal mode.

Navigation has also been expanded to support all standard navigation keys, and a new option allows opening the system menu directly from the Alt+Tab interface.