Hi, there!
First of all, I am still using the ROX-Desktop (and I never used a linux desktop this long before) :-) Second, I am missing two little applets that I have not the time to write myself now - maybe someone would like to give it a shot while I am busy:
1. clipboard applet - something like klipper, gnome-clipboard, wmcliphist, that stores your selections to be selected and reinserted into the X paste buffer.
2. launchbar - icewm got that feature and I bet there are implementations for different desktops, too, a simple entry field that lets you enter program names, file names, URLs and does The Right Thing (TM) with them (Configurability rules).
Thx, Alex