MetaModel Manager for transdisciplinary species risk assessment
...MetaModel Manager allows any number of models representing species demography, diseases, landscapes, human actions, or other processes to be linked to models of population dynamics.
MapSim is a simulation engine for System Dynamics. It provides a .NET library that works on Windows and under Mono on Linux. A simple GUI tool is provided too. MapSim uses its own modeling language described in the reference manual.