Ah Slit.. yeah, that's it.
You can make Slit window run both fluxbox native Dockaps and WindowMaker Dockaps (of which there are hundreds/thousands). If you make it run w/ WM Dockaps, just download a dockap that has quick-launch icons, and just add your icons to that.
Check out the docs
http://www.fluxbox.org/docbook/en/ht...html#slitorder for more info. They provide links to a couple great Dockaps sites.