GtkGraph is a simple graphing calculator written
for X Windows using the GTK+ widget set.  It includes
the following features:

 * Plotting up to ten functions on the same "canvas" 
 * Allowing the user to select the range of the canvas. 
 * Usage of functions exp, sin, tan, cos, asin, atan,
   acos, sec, csc, cot, log, ln, abs, sqrt, and constants
   pi and e. 
 * Saving and loading sets of functions to plot 
 * Printing 
 * Exporting the graph to PostScript, or any bitmap format
   that Imlib supports (JPEG, XPM, PNG...) 
 * Arithmatic and algebraic calculations 
 * Allowing the user to customize colors and axis and plot
   titles 

WWW: http://vitelus.com/gtkgraph/

- Chris D. Faulhaber
jedgar@FreeBSD.org