Download DISLIN - free for personal use
You can draw DXF files - which is actually quite easy and then use a DXF viewer
You can get the FORTRAN book for Australia - CVF and use the samples
You can use a GIF fie generator -- they are around somewhere
Step 1 is the fastest, Step 2 is for high quality engineering prints, Step 3 is for the average programmer who has no idea what a DXF files is and cannot down load DISLIN and the last one is for the really desparate in this world as you would be better recoding in a drawing language.
Last step as I did last week for a paper - print to a CSV file and use EXCEL
If you have Microsoft Office or Excel available on your computer there is a nice interface from Fortran to Excel for using the Excel graphing features. Look in the IVF samples (part of the Fortran installation package) for the solution "Autodice". The comments in the source will give you more information about using the interface to Excel and its graphing options.