Cisco Packet Tracer - Download Cisco Packet Tracer, an innovative network simulation and visualization tool used by Cisco Networking Academy students and instructors.
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
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.
AWS Self-Paced Labs - Self-paced training labs help you test products and gain practical experience working with AWS - learn on-demand at your own pace.
ns-3 - a discrete-event network simulator for internet systems