Gnuplot is a scientific plotting package. Gnuplot 4.0 installer for Mac OS X available.Long overdue, a binary installer package of gnuplot 4.0 for Mac OS X is now available from the main download site,
http://sourceforge.net/projects/gnuplot
This binary was built with support for, and requires the presence of, AquaTerm and XWindows (X11).
AquaTerm can be freely downloaded from http://aquaterm.sourceforge.net and
X11 can be installed from your Mac OS X install CD or downloaded from Apple, http://www.apple.com
The download features a standard installer and comes with documentation in PDF-format as well as "man" and "info" pages.