Emergent (a major rewrite of PDP++) is a comprehensive simulation environment for creating complex, sophisticated models of the brain and cognitive processes using neural network models.
L. Abele, L. Ollinger, I. Heck, and M. Kleinsteuber. Trends in Intelligent Robotics, Automation, and Manufacturing: First International Conference, IRAM 2012, Kuala Lumpur, Malaysia, 330, Springer, Heidelberg, (2012)