DPlot Jr represents a free scaled-down version of DPlot intended for use by programmers which want a quick method for displaying graphical output of their own applications. Unlike the full version of DPlot, DPlot Jr may be redistributed to end users without royalty payments or other restrictions.
There's nothing to buy and no registration fee involved. Input to DPlot Jr is accomplished through Dynamic Data Exchange (DDE), either from your application or via the supplied DPLOTLIB interface. The end user cannot open a file or paste data from the clipboard. DPlot Jr also lacks many of the editing and data generation features of the full version.