BrainBox is a Windows program (3.1 or 95/98) that allows one to graphically build and execute neural networks. Use the mouse to drop neurons, drag links from one neuron to another, adjust the weights, and watch what happens when the network executes. There is no automated learning; you are in complete control. Take a look at BrainBox's demo files to see what it can do.
In this screen shot, BrainBox is executing a small neural network.