GNS3 - GNS3 is a graphical network simulator that allows simulation of complex networks.
QlikSense - A business discovery platform that delivers self-service business intelligence capabilities
ns-3 - a discrete-event network simulator for internet systems
Looker - Looker makes it easy for analysts to create and curate custom data experiences—so everyone in the business can explore the data that matters to them, in the context that makes it truly meaningful.
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.
Qlik - Qlik offers an Active Intelligence platform, delivering end-to-end, real-time data integration and analytics cloud solutions to close the gaps between data, insights, and action.