FortiGate SD-WAN - SD-WAN
GNS3 - GNS3 is a graphical network simulator that allows simulation of complex networks.
Cisco Meraki SD-WAN - What is SD-WAN?
ns-3 - a discrete-event network simulator for internet systems
VeloCloud - SD-WAN
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.