GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.
JFreeChart - The official home page of the JFreeChart project.
GeoGebra - GeoGebra is free and multi-platform dynamic mathematics software for learning and teaching.
Matplotlib - matplotlib is a python 2D plotting library which produces publication quality figures in a variety...
Graph - Graph is an open source application used to draw mathematical graphs in a coordinate system.
kSar : a sar grapher - ksar is a sar graphing tool that can graph for now linux,mac and solaris sar output.