MBDyn - MultiBody Dynamics Software is a free MultiBody Dynamics analysis software system developed at the Dipartimento di Ingegneria Aerospaziale of the University "Politecnico di Milano", Italy. It uses netCDF as its primary output format.
MBDyn features the integrated multidisciplinary analysis of multibody, multiphysics systems, including ... nonlinear mechanics of rigid and flexible constrained bodies, smart materials, electric networks, active control, hydraulic networks, essential fixed-wing and rotorcraft aerodynamics. It allows users to simulate the behavior of heterogeneous mechanical, aero-servo-elastic systems based on first principles equations. It is being actively developed and used in the aerospace and automotive fields for dynamics analysis and simulation of complex systems. Dynamic linking of user-defined modules is heavily exploited to let users extend the feature library.