I came across this great web site today after working through some notes I had found on-line by Blake Stacey about Group Theory. FGB stands for Finite Group Behaviour and is a Windows 98 program. I have downloaded the program and associated documentation to try it. It looks very promising indeed as a learning aid. After checking it out I will register, as requested by sending my contact details to Dr. Keppelmann.
There is also the web site of Dr. Ed Keppelmann of the Mathematics Department of the University of Nevada, Reno.