slm - Slim, Jade like template engine for node
Cisco Packet Tracer - Download Cisco Packet Tracer, an innovative network simulation and visualization tool used by Cisco Networking Academy students and instructors.
FlexSim - Simulation software to model, simulate, predict, and visualize systems in manufacturing, material handling, healthcare, warehousing, mining, etc.
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
OpenModelica - OpenModelica – A Free Modelica Environment!
GNS3 - GNS3 is a graphical network simulator that allows simulation of complex networks.