An advanced network simulator to design and configure virtual networks
Build, Design and Test your network in a risk-free virtual environment and access the largest networking community to help. Whether you are studying for your first networking exam or building out a state-wide telecommunications network, GNS3 offers an easy way to design and build networks of any size without the need for hardware.
Virtual T is a TRS-80 Model 100/102/200 emulator that runs on Windows, Linux, and Macintosh. The goal of Virtual T is to provide 100% hardware emulation so any existing programs will run. It also adds powerful development and debugging tools.
Wireless Land (WL) implements a wifi layer for the User Mode Linux architecture. It comes with a Wireless Land server which provides the virtual wireless cards and a GUI for the network visualisation.
The Network Simulation Environment (NOSE) has the capability to virtually create complex networks including different types of operation systems very cost-efficient on a single computer.