GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.

Dash Reports - Dash Reports is a versatile and light weight reporting solution.

GeoGebra - GeoGebra is free and multi-platform dynamic mathematics software for learning and teaching.

Graph - Graph is an open source application used to draw mathematical graphs in a coordinate system.

Matplotlib - matplotlib is a python 2D plotting library which produces publication quality figures in a variety...

kSar : a sar grapher - ksar is a sar graphing tool that can graph for now linux,mac and solaris sar output.