I've put some freeware dtksh demos online at,

        http://www.**-**.com/

dtksh is the Korn shell 93 variant that has the ability to draw X11 GUIs.
No compiling, no libraries - a simple way to create standalone GUIs.

The demos on the website include:

        xvmstat - an X11 version of vmstat for Solaris
        xplot - a X11 plotter that reads and plots numbers from STDIN

xplot is similar to other tools where you are processing fields,
eg "| sort -n +4"; xplot takes a field and plots it on a graph,
eg "| xplot -f 4".

Enjoy!

Brendan Gregg

[Sydney, Australia]