x11/wmctrl 1.07p9 OpenBSD

The wmctrl program is a command line tool to interact with an EWMH/NetWM compatible X Window Manager.

It provides command line access to almost all the features defined in the EWMH specification. Using it, it's possible to, for example, obtain information about the window manager, get a detailed list of desktops and managed windows, switch and resize desktops, change number of desktops, make windows full-screen, always-above or sticky, and activate, close, move, resize, maximize and minimize them.

The command line access makes it easy to automate these tasks and execute them from any application that is able to run a command in response to some event.