WMServices is a dockable app which intends to make checking for server availability a bit easier. The app, given up to five server IP's or hostnames and ports continuesly checks whether they are up and informs the user accordingly(using green or red font).
wmxkb shows and controls XKB groups (XFree86 key maps). It can be used as a dockable/swallowed applet with Window Maker, BlackBox and clones (incl. FluxBox), or any window manager that supports swallowing, including gnome-1, kde(kpanel)-1, afterstep, fvwm and clones. Alternatively, you can run wmxkb as a normal window with any window manager.
WnDO is a small suite of complementary tools for behavioral extensions to Fluxbox, Xfce, and other light-weight window managers. WnDO offers a plugin platform for tweaking the desktop environment. It modifies behavior, rather than adding desktop widgets. It has minimal dependencies beyond Python. Included modules handle window alignment and tiling, process management, and wallpaper management, including per-workspace wallpaper and random wallpaper changing.
XDG-Menu is a ROX panel applet that displays an applications menu button. The menus it builds fit the XDG Menu Specification published by freedesktop.org.
Xfce WMdock Plugin
The WMdock plugin is a compatibility layer for running WindowMaker dockapps on the XFCE desktop. It integrates the dockapps into a panel, closely resembling the look and feel of the WindowMaker dock or clip.