This Windows application is meant to be replacement for the Start menu, and perhaps the entire shell (explorer).  Commands can be executed single or double clicking.  It features Tcl/Tk support via [TCLBridge], drag and drop, COM plugin support with event hooking (see http://www.tclbridge.com/toolbar/Plugins.html), "floating" command support, and full scriptability.  A trial version is available for download at: http://www.tclbridge.com/toolbar/TclToolbar.zip

Was also known as "Joe's Really Spiffy Tcl/Tk Toolbar".  It is now known as LiquidToolbar.

NOTE: Also known as "Joe's Really Spiffy Tcl/Tk Toolbar"