SimulationX is described as 'Interdisciplinary, multi-domain simulation software for the design, analysnd optimization of complex systems on a single platform. More than 500 ready-to-use model elements and over 300 examples of models from 11 application areas simplify and accelerate' and is an app in the education & reference category. There are more than 25 alternatives to SimulationX for a variety of platforms, including Windows, Linux, Mac, Web-based and Python apps. The best SimulationX alternative is MATLAB. It's not free, so if you're looking for a free alternative, you could try Spyder or SciPy. Other great apps like SimulationX are Circuit JS, NumPy, SymPy and PTC Creo.