You could use wmctrl -l -p to also get the pids and then get the start times for each PID with ps -p $$ -o lstart. Then you could sort by start time and only th

You could use wmctrl -l -p to also get the pids and then get the start times for each PID with ps -p $$ -o lstart. Then you could sort by start time and only then choose the nth window. There still might be multiple windows belonging to the same pid, though. And if you close windows, the list might still change. You could also hardcode win+1-9 to specific programs, then they would even be consistent over restarts. Then again, the docklike plugin mentioned in the other answer might be similar to that.