DPlot

Beta version is available at [Edit: link removed. Normal version now includes these features]. Licensed users must have version 1.9 or later installed before installing this version. If you're a licensed user not on the mailing list, contact me for instructions in getting version 1.9.1 before installing this beta.

Just a couple of changes:

• Expanding on the new capability of the Fill Between Curves command, you can now fill the area between a single curve and a horizontal line with a specified Y value. You can also specify different colors for the areas above and below the line.
• Axes at 0 tick marks, labels, and line(s) are no longer obscured by curves or fills between curves.

Thanks to jgmiles for both suggestions.