SystemModeler is a new physical modelling and simulation tool, from the makers of Mathematica. Unlike other systems, SystemModeler requires no add-ons and fully supports the standard Modelica model language. SystemModeler makes it easy to develop detailed, realistic models in any industry or application area. A core set of physical and logical components is built in, and custom libraries can be developed to represent the key elements and processes in any domain. Modelling, simulation, visualisation, and analysis with Mathematica are tightly integrated, reducing development time.