Amygdala is an implementation of a Spiking Neural Network simulator.
Amygdala is still in early stages of development so don't bet your job on it. This doesn't mean it's useless. Here is a short summary of what's already in place:
Neuron models emphasizing on speed and others with an emphasis on biologically accurate modeling
Support for SMP machines
Evolving neural networks using a Genetic Algorithm
Tools to analyze and visualize the topology of the NN
Future versions of Amygdala will have
Support for clusters of workstations and massive parallel machines such as the IBM SP/2