Cisco Packet Tracer - Download Cisco Packet Tracer, an innovative network simulation and visualization tool used by Cisco Networking Academy students and instructors.

CloudShare - ClousShare provides a cloud-computing platform for developing and testing IT applications, software and systems.

ns-3 - a discrete-event network simulator for internet systems

CBT Nuggets - CBT Nuggets is a video-based eLearning platform for IT professionals. It is accessible from both a desktop browser and mobile devices. Learners pay on a monthly, semiannual, or annual basis, with discounts available for multi-year agreements.

GNS3 - GNS3 is a graphical network simulator that allows simulation of complex networks.

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.