xlax binary package in Ubuntu Noble amd64

 xlax is an X11 input multiplexer: it sends your keyboard input
 from the xlax window to a group of windows simultaneously.
 The tool is designed for system administrators who typically
 have to do the same thing on several machines (or in several
 different directories). Windows can be added or deleted
 interactively, or temporarily disconnected and reconnected.
 xlax allows you to assign a custom string to each window
 (e.g. a hostname) that can be sent with a button click.
 An included script handles starting up and arranging windows,
 and allows you to set up commonly used window groupings
 in a config file.

Source package