GNS3 - GNS3 is a graphical network simulator that allows simulation of complex networks.
ns-3 - a discrete-event network simulator for internet systems
Paessler Multi Server Simulator - Paessler Multi Server Simulator is inexpensive and robust software that helps you power massive-scale testing.
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
Ranplan Wireless - Ranplan Wireless is a leading platform that has revolutionized itself with innovative wireless tools and software based on extensive technology.
Wolfram Mathematica - Mathematica has characterized the cutting edge in specialized processing—and gave the chief calculation environment to a large number of pioneers, instructors, understudies, and others around the globe.