VIZ
VIZ Version 2.1   (4 MB)
Install VIZ on your PC by unpacking the installation download (that's often automatic) and double-clicking on setup.exe and doing the usual installation process.  As far as I can tell it works on all normal XP, Vista, and 7 computers.   Then run VIZ (the installation should put a link pretty high up in your start menu, apologies if that's intrusive, or you can go to your Programs directory and click on visualize.exe itself).  VIZ will start by asking you for a file, you should browse to the .diel file you download from this page.  Then pick something to plot from the pulldown, click plot and you should be in business.  VIZ is hopefully self-explanatory and there is no way to do damage so the easiest thing to do is to play with the buttons.  VIZ never alters the original .diel file (or anything else on your computer) and it only saves files one at a time using an ordinary file browse dialog, so you can't even write a bunch of files by mistake.*

Examples
All 5 examples (+1) in a zip file
This is a zip file of the examples described in the Examples section. 

Utilities
ListInterfaces Version 1.1
This is a console-type utility that will find the USB devices that GADD knows how to use and display for you their names, serial numbers, and port assignments.  It can be useful when setting up a system.

Dwyer Lovelink
This is a program from Dwyer Instrument Company that can help check and set up a Love Controller.

Drivers
FTDI drivers
This is the driver for the Prologix GPIB interface and the USB-RS485 Converters from the FTDI download page

GADD
GADD Version 2.2, Feb 23, 2010; External data bit support.
GADD Version 2.2, Dec 16, 2009; Includes DMM temperature measurements, 3D flying plots.
GADD Version 2.1  Please note, this is downloaded by password.

Scripting Tutorial
A tutorial (pdf format) for writing GADD scripts. 


External links up to date as of Nov 21, 2009


*Not a legal declaration, this is just a statement of how I wrote it and my experience about how it behaves.