X11: Setting a window undecorated or always-visible via command-line

Question

This question mentions the tools xdotool and wmctrl which are able to change a window's geometry via the command-line. This OK.

But, what if I want to do more advanced operations, for instance:

• Setting a window undecorated.
• Making a window visible on all desktops (omnipresent).
• Setting a window always visible.

Are there any tools allowing me to do the things avobe from command-line?
I use Openbox as my window manager.

Answer 1

wmctrl can set the on-all-desktops and always-on-top properties using the -b option (the specific properties are sticky and above, respectively)