AnyLogic - AnyLogic has changed simulation modeling and expanded its application into complex business environments. The unmatched flexibility of multimethod modeling allows users to capture the complexity of virtually any system, at any level of detail.
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.
Simio - Facility design simulation & production scheduling
ns-3 - a discrete-event network simulator for internet systems
Arena Simulation Software - Arena Simulation Software is an intuitive simulation software solution that helps you arrive at the right decision at the right time to help you ripe the best for your business.
Paessler Multi Server Simulator - Paessler Multi Server Simulator is inexpensive and robust software that helps you power massive-scale testing.