Actran - Actran is a finite element-based simulation software to analyze the acoustic behavior of mechanical systems and parts.
Cisco Packet Tracer - Download Cisco Packet Tracer, an innovative network simulation and visualization tool used by Cisco Networking Academy students and instructors.
EcosimPro - EcosimPro is a continuous and discrete modelling and simulation software.
GNS3 - GNS3 is a graphical network simulator that allows simulation of complex networks.
E-Hub - Simulation Modeling
Paessler Multi Server Simulator - Paessler Multi Server Simulator is inexpensive and robust software that helps you power massive-scale testing.