wmalauncher is an easy to use and highly configurable application launcher especially designed for fluxbox, but which also works well under blackbox, openbox, windowmaker.
wmalauncher supports XPM, PNG, SVG icons, .desktop files, true-type fonts (for tooltip text), allows to configure, among others, the brightness, contrast and gamma correction of icons, allows to draw a frame around the button, etc...
powerkit is an lightweight desktop independent full featured power manager, originally created for Slackware (but will work on any Linux/FreeBSD distro) for use with alternative desktop environments and window managers, like Fluxbox, Blackbox, FVWM, WindowMaker, Openbox, Lumina and others.