- Open Dynamics Engine (ODE), DynaMechs, EasyDyn, MBDyn: libraries and programs for simulation of multibody dynamics. MBDyn also has a realtime sub-project here.
- mjbWorld is a program for 3D simulation of dynamics.
- Model Transformation Tools, set of tools for modelling dynamic physical systems using the bond-graph methodology and transforming these models into representations suitable for analysis, control and simulation. These tools use, and generate m files for, GNU Octave.