Pedagogical tools are designed to convey important lessons and allow people to improve their understanding of a problem or undertaking. Though, in a sense, these are the goals of any successful system dynamics study, the pedagogical tools focus on the teaching part, not the analysis of novel situations.
Sysdea®, from Strategy Dynamics Ltd is an on-line, browser based, system dynamics tool (latest browser required). No install required. It is easy to use, has extensive documentation and has easy model sharing options. Is ideal for teaching. Free account for one model available else low cost subscription.
InsightMaker®, from Give Team, is a powerful, free System Dynamics modeling tool that runs completely in the browser. It enables you to build, run and share System Dynamics models without downloading or installing a single program.
NetLogo®, from Northwestern University, is a multi-agent programmable modeling environment. It has the ability to build system dynamics models. It is used by tens of thousands of students, teachers and researchers worldwide. It also powers HubNet participatory simulations.
Stella Modeler for iPad®, from isee systems, is new implementation of Stella.
VisualAivika 5®, from Aivika Soft, is an easy-to-use diagram editor that allows creating nice looking Casual Loop Diagrams (CLD) as well as Stock and Flow Maps (SFM). There is also a simulation component that supports its own high-level modeling language. There is the equation editor, where you can define integrals, arrays, random functions. Moreover, VisualAivika supports the Monte-Carlo simulation, which allows providing Sensitivity Analysis. There are means for plotting charts on the diagram to show the results of simulation in a form of Time Series, XY Chart and Deviation Chart. The results can be exported.