!Surfer
Surfer is another ubiquitous Stats program which works with [ArcGIS].  
Maybe it's not ubiquitous, but by the time you've installed all these programs and you take the time to start them up, you'll notice quickly that they all seem very similar. 
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Installation of Surfer is more difficult because we have misplaced the key.  If the only CD you find is not version 8, try the following:
#Manually copy the program directory from [Beagle].
#Find another computer with a working copy and copy it's serial number from the about windows.
#Use that serial number to register the new copy of Surfer.