FlexSim - Simulation software to model, simulate, predict, and visualize systems in manufacturing, material handling, healthcare, warehousing, mining, etc.
Uber Cloud - UberCloud is the cloud for engineers that provides cloud simulation solutions for engineers and scientists.
ns-3 - a discrete-event network simulator for internet systems
SprutCAM - SprutCAM all-in-one software for CNC machines programming
Paessler Multi Server Simulator - Paessler Multi Server Simulator is inexpensive and robust software that helps you power massive-scale testing.
SIMUL8 - Simulation is an effective system that permits you to make striking, certain choices since it gives you the confirmation to make certain you are settling on the right decision.