A software, Multi-Level Management Support Simulation Tool with Anticipation and Retardation (M2-STAR), was designed to simulate dynamical and anticipatory models of management. M2-STAR is open source so everyone will be able to change and improve the models. M2-STAR is continuously developed and run with free and commonly available development and run-time environments. M2-STAR is a web-application based on an Apache 3 web server and with PHP 4 as programming language. An experimental version can be accessed at http://www.c8systems.com/mad/start.html, with an example of model.