You are of course welcome to distribute any files you produce using DPlot to others. If you want users to be able to view your DPlot .GRF files (as opposed to saved bitmaps, metafiles, etc.) then those users need a viewer. The solution is DPlot Viewer.
DPlot Viewer is a free scaled-down version of DPlot intended for use by developers that want to distribute DPlot graphs to others. DPlot Viewer will display and print any graph produced by DPlot or DPlot Jr. DPlot Viewer may be redistributed to end users without royalty payments or other restrictions.
For more information and/or to download DPlot viewer visit the DPlot web site.