SciDaVis - SciDAVis is a free application for Scientific Data Analysis and Visualization.
kSar : a sar grapher - ksar is a sar graphing tool that can graph for now linux,mac and solaris sar output.
GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.
timeplotters - Timeplotters are command-line tools for visualizing temporal data, especially useful for...
Matplotlib - matplotlib is a python 2D plotting library which produces publication quality figures in a variety...
DataMelt - DataMelt (DMelt), a free mathematics and data-analysis software for scientists, engineers and students.