Software Extending the System Dynamics Methodology

At its heart System Dynamics is about feedback, and feedback can manifest in a number of ways beyond the classic stock and flow structure behind the integral equation view that underlies most work in system dynamics. The tools listed here allow integral equation models to be built, but also support alternative representations.

Anylogic, from XJ Technologies, supports models containing discrete event, agent based and system dynamics constituents. It is available under a commercial license.

Dynaplan® Smia, from Dynaplan, combines elements of simulation modeling, spreadsheet modeling and presentation development in an integrated platform. It is available under a commercial license.

GoldSim, from The GoldSim Technology Group, has a focus on Monte Carlo simulation but can support stock and flow style modelling. It is available under a commercial license.

Berkley Madonna uses a differential equation representation to develop models. It is available under a commercial license.

Exposé from Attune Group, Inc., is an Excel add in that supports visualization of feedback within spreadsheets and allows visual cause and effect editing within Excel.  It is available under a commercial license

Powersim Studio, a core tool also permits discrete modeling and combined continuous/discrete modeling. It can be used to do some agent based modeling. It is extensible with VBScript and C++ routines. Please see the Core Software page.

Simile, from Simulistics, is  system dynamics and object based modeling and simulation software.  It is available under a commercial license.

Simgua is a visually based model development environment. It is available under a commercial license.

TRUE,  from TRUE-WORLD, is visually oriented software for developing and animating models.  It is now (2014-02-05) freeware.