In this paper we describe the characteristics of a software library For multibody simulation which is compliant with a large variety of simulation environments. This software package is the result of the current needs of multibody clients, who demand far more than a traditional application able to model and analyze mechanisms. They want a tool which is highly flexible, efficient and transparent and can therefore be used to integrate multibody models in the frame of real-time multidisciplinary simulations. In order to show the good performance of this tool, its application in European project ODECOMS is presented.