BioWin - BioWin
GNS3 - GNS3 is a graphical network simulator that allows simulation of complex networks.
STOAT - STOAT - a dynamic sewage treatment works modelling package
ns-3 - a discrete-event network simulator for internet systems
Aspen Plus - Maximize profits using a plant-wide simulation solution that combines unparalleled accuracy and engineering collaboration with time-saving workflows.
NetSim - NetSim software was created to simulate various Cisco systems. Cisco software is known around the world as being one of the best network, routing and switch systems for businesses and private use. Read more about NetSim.