sarface is a user-interface to the sysstat/sar database which inputs data from sar and plots to a live X11 graph via gnuplot. It mimics the cmd-line options from sar but can cross-plot any two or more stats and apply simple mathematical functions them.
Command line tool that creates charts from SysStat output and presents them through HTML pages. It is also capable to display charts from several machines at a single site.