GraphIt is a general purpose plotting program. It can generate simple graphs such as the one shown below:
or more complex plots such as the one shown below:
The raw data for the graph can be entered manually or read from CSV ("comma separated values") files. You can employ GraphIt, Notepad, Excel, or a long list of other programs to prepare these CSV files. The on-line Help documentation explains all of the formatting capabilities of this program. Besides being able to generate printed graphs, the GraphIt program also allows you to create .BMP files or .GIF files that you can import into word processor documents and thereby embed a graph inside a report.