My first contact to Tcl/Tk was in 1996 when I searched a widget set easy to use and powerful in graphics (canvas) for my EDA software Xelen. Soon I were fascinated of it and also programmed many small tools for my desktop.
We are developing electronics and process lines for surface technology (http://www.electronic-thingks.de ) and Tcl/Tk helps me to get GUIs very quickly to control and visualize my circuits.
Residence is between Cologne and Koblenz, Germany
Best regards, Christoph (chd)