DPlot

This likely won't affect too many, but IF you're running Excel 2013 AND you frequently append Excel data to existing plots using the XYYY command, you'll probably want to download an update before the next DPlot release. First, start Excel and select File>Options>Addins, click the Go button, then uncheck "DPlot interface" and click Go. Exit Excel. Next, download http://www.dplot.com/excel/dplotlib.xla and save to %appdata%\Microsoft\Addins, overwriting the existing version. Restart Excel. Select File>Options>Addins, click Go, and check the "DPlot interface" box. Click OK.

Let me know if you have any questions or problems with this.