Simulab is a web-based application that allows users to simulate discrete-event queue networks using Vue.js, Flask, Socket.IO, and the General Simulation Framework (GSF). The application provides a user-friendly interface for creating and running simulations. The General Simulation Framework is a Python library that provides a flexible and extensible platform for building simulation models. Simulab uses GSF to model the behavior of queue networks, including the arrival and departure of customers, queueing delays, and service times. The web interface of Simulab is built using Vue.js, a progressive JavaScript framework that makes it easy to develop dynamic user interfaces. The interface allows users to create simulation models by specifying the network topology, arrival and service distributions, and other simulation parameters. Flask is used as the web server framework for Simulab. Flask provides a simple and flexible architecture for handling requests and responses for the app. Socket.IO is used to enable real-time communication between the client-side web application and the server-side simulation engine. This allows the simulation results to be displayed in real-time as the simulation runs