Pinebush Technologies [http://www.pinebush.com] makes HyperPlot and HyperXpress raster image processing software.  In short, we sell software to print really big files in various formats to virtually any printer or plotter ''really fast''.  ENCAD [http://www.pinebush.com/press10.html] and others OEM our product to drive their plotters.  

We use Tcl and TclX as a cross-platform scripting framework and Tcl/Tk with BWidgets to build our user interfaces.

-- [Chris Nelson]