Well, with xte, anything that runs commands can do it; so any of Personal Menu, CmdNav, osso-statusbar-cpu, powerlaunch, and probably others will do. Trouble is, they don't give you the always-on-top window you want, so you have to launch them with the panel, or with the power button, in the case of powerlaunch.
Attempt at reducing screen footprint and looping coming right up.