SNNS

SNNS (Stuttgart Neural Network Simulator) is a neural network simulator originally developed at the University of Stuttgart. While it was originally built for X11 under Unix, there are Windows ports. Its successor JavaNNS never reached the same popularity.

Features
SNNS is written around a simulation kernel to which user written activation functions, learning procedures and output functions can be added. It has support for arbitrary network topologies and the standard release contains support for a number of standard neural network architectures and training algorithms.

Status
There is currently no active development or maintenance of SNNS going on. As of 2006, there are several patches for known problems available which haven't been integrated into a new release for years and the license does not allow publishing modified versions.