[emilsedgh]

KDE's window manager, Kwin, supports this functionality built it.

Just right click on any title bar on a window, go to "Special Application Settings" -> "Arrangement and access" -> "Shortcut". You can manually type "F8" in the shortcut and it'll work just fine.

You can also go to "System Settings" -> "Window Rules" to manage all rules you've defined.

[StavrosK]

That settings dialog is a lifesaver, thank you. I've been using devilspie2 to do the same, but now I can do it natively.