Some time ago i've start writing Qt port of xfce4-panel.
Mainly to don't forget how to write programs using Qt toolkit.
Now it is in phase pre-alpha (not usable), but works even
have few plugin (launcher, show-desktop and action).
If i'll have more time, maybe i'll continue the work and
the goal will be something similar to xfce only based on Qt.
But the question is: Is there anybody who is interested to
using something like that?