General Software and Toolkits

Last Updated: 14 June 2009

Site maintained by:

Leigh Tesfatsion

Department of Economics

Iowa State University

Ames, Iowa 50011-1070

http://www.econ.iastate.edu/tesfatsi/

tesfatsi AT iastate.edu

ACE Website Homepage

This site stresses general programming languages and toolkits suitable for agent-based computational economics (ACE) and complex adaptive systems (CAS) modeling. Computational laboratories and interactive demonstration software focused on more specific types of ACE/CAS applications are gathered together at a separate site titled the ACE/CAS Computational Laboratories and Demonstration Software.

Software Release Disclaimer:

All software provided below is unsupported and provided as-is, without warranty of any kind, unless otherwise specified by the provider.

• Introductory Materials
• Software and Toolkits Currently in Use by ACE Researchers
• Software and Toolkits for General CAS Modeling

Introductory Materials

• Agent Toolkits for Teaching: A Survey
  Paraphrased from UMBC AgentNews (v7n10, 7 July 2002): A pdf version of a paper titled "Agent Toolkits: A General Overview of the Market and an Assessment of Instructor Satisfaction with Utilizing Toolkits in the Classroom" (by Alexander Serenko and Brian Detlor, McMaster University, Working Paper 455, July 2002, 49pp), is available here.

  Evaluation of Java-Libraries for Social Science Simulation

  Robert Tobias and Carole Hoffman have published an article titled ``Evaluation of Free Java-Libraries for Social-Scientific Agent Based Simulation'' (html) in the electronic journal JASSS (Volume 7, Number 1, 2004). The authors compare and formally evaluate four freely available Java programming libraries for the support of agent-based modeling in the social sciences: Repast, Swarm, Quicksilver, and VSEit. A brief discussion of other simulation frameworks is also given.

  Pseudo-Random Number Generators

  The pLab Project: Pseudo-Random Number Generation is a resource site on the theory and practice of pseudo-random number generation. The site is maintained by a team of Austrian mathematicians and computer scientists led by Peter Hellekalek at the University of Salzburg's Mathematics Department. Resources provided at the site include specific pseudo-random number generators, tests for randomness, news, literature, software, and related links.

  Template Model for ABM Platform Comparisons

  Steven F. Railsback, Steven L. Lytinen, and Stephen K. Jackson have developed StupidModel: A Template Model for ABM Platforms. The template model is implemented in five different platforms: NetLogo; RepastJ; MASON; Java Swarm; and Objective C Swarm. Although relatively simple, StupidModel includes many commonly used features of agent-based modeling (ABM) platforms. Sixteen versions of StupidModel are implemented for each platform, beginning with a bare bones version and ending with a relatively sophisticated version that involves two agent types, a full agent life cycle (birth, reproduction, predation, and death), and a habitat with data read from an input file. Each implementation is made available as freeware with accompanying implementation notes. In addition, the authors include at this site a pointer to a paper titled "Agent-Based Simulation Platforms: Review and Development Recommendations" that reviews and compares the five ABM platforms and seeks to identify key development priorities both for these specific ABM platforms and for ABM platforms in general.

  Visual Basic, Java, and C++ Resources Online

  An annotated list of online resources for Visual Basic, Java, and C++, including course notes, tutorials, and code collections, is available here.

Software and Toolkits Currently in Use by ACE Researchers

• Adaptive Modeler - Agent-Based Financial Market Simulation Platform (Proprietary)
  The Adaptive Modeler, developed by Jim Witkam (Altreva, Inc.), creates agent-based market simulation models for price forecasting of real world stocks, currencies or other market traded securities. The agent-based model simulates a financial market consisting of thousands of agents whose (technical) trading rules evolve through a special adaptive form of genetic programming. The evolution of trading rules combined with market pricing dynamics drives the agent population to learn to recognize and anticipate recurring price patterns while adapting to changing market behavior. Forecasts can be based on either the behavior of all agents or on a dynamic group of the best performing agents. For ACE researchers this application may be of interest to study the behavior and emergent predictive abilities of an agent-based market model that includes information from a real-world market. Several model initialization options are included such as a user configurable genetic programming engine for the creation of trading rules. Simulation of zero intelligence trading is also supported. Various population statistics and other data can be visualized in charts, distribution histograms and scatter plots, all in real-time. Data can be exported to CSV files for further analysis in other applications. A free (non-expiring) evaluation version with extensive documentation can be downloaded from the Adaptive Modeler homepage, above. Adaptive Modeler is targeted for Windows platforms and requires an installation of Microsoft .Net 2.0 or higher.

  AnyLogic - Multi-Paradigm Simulation Software (Java, Proprietary)

  From the Software Homepage: "AnyLogic is the only simulation tool that supports process-centric (also called discrete event), system dynamics, and agent-based modeling approaches. The unique flexibility of the modeling language enables the user to capture the complexity and heterogeneity of business, economy and social systems at any desirable level of detail. AnyLogic set of primitives and library objects allows you to model manufacturing and logistics, business processes, human resources, consumers' and patients' behavior, as well as the environment (the "background") in their natural interaction. The object-oriented model design paradigm supported by AnyLogic provides for modular and incremental construction of large models." For general information about AnyLogic, including documentation, utilities, and pointers to research papers implemented with AnyLogic, visit here.

  Ascape (Java, Free Open Source)

  Ascape (Agent Landscape) is a research tool for agent-based research developed by Miles T. Parker, a former software engineer at the Brookings Institution. Ascape is designed to be flexible and powerful, but also approachable, easy to use and expressive. A high-level framework supports complex model design, while end-user tools make it possible for non-programmers to explore many aspects of model dynamics. It is written entirely in Java, and should run on any Java-enabled platform. Models developed within it can be easily published to the web for use with common web browsers. Ascape is now a full open source release.

  A tutorial by Miles T. Parker on the design, development, and use of Ascape, titled "What is Ascape and Why Should You Care", appears in the January issue of the electronic Journal of Artificial Societies and Social Simulation, Volume 4 (Number 1), January 2001.

  Cormas: Software for Renewable Resource Management (Smalltalk)

  From the Cormas Website: "Resource management systems are complex when common resources are exploited by a number of users. Ecological dynamics are expressed at different levels, i.e., individual, population, and community. Social dynamics are expressed at the level of individuals or organizations. In renewable resource management, the interactions between the dynamics of agriculture and resource use must be taken into account. Computer modeling facilitates the understanding of these interactions. ... Cormas is a multi-agent simulation software for renewable resource management. It provides the framework for building models of the interactions between individuals and groups using (renewable) resources."

  ECJ: Evolutionary Computation Library

  The George Mason University Evolutionary Computation Laboratory and Center for Social Complexity has announced a major new release of the ECJ evolutionary computation library. The system is also being re-licensed under the Academic Free License version 3.0. The latest release of ECJ has numerous bug-fixes, speed improvements, and a new package (spatial embedding). Additional information about this latest release of ECJ can be found here.

  Gambit: Game Theory Software (C++)

  Gambit is a library of game theory software and tools for the construction and analysis of finite extensive and normal form games currently maintained by researchers at the Department of Economics, Texas A & M University. Gambit includes a graphical user interface, the Gambit Command Language, and a library of C++ source code for representing games, suitable for use in other applications. All Gambit source code is freely available, licensed under the GNU General Public License.

  JASA: Java Auction Simulator API

  From the developer (Steve Phelps, U of Liverpool): "Jasa is a high performance auction simulator suitable for conducting experiments in agent-based computational economics. It implements various auction mechanisms, trading strategies and experiments described in the computational economics literature, and as the software matures we hope that it will become a repository for reference implementations of commonly used mechanisms, strategies and learning algorithms. In order for this project to succeed feedback, in the form of code fixes, code contributions and replication attempts, is vital and greatly welcomed."

  jES: Java Enterprise Simulator (Swarm, Java)

  Pietro Terna (Economics, University of Torino, Italy) has developed the Swarm-based Java Enterprise Simulator (jES). The aim of jES is to permit the construction of simulation models for both actual and virtual enterprises (firms). The simulator can model either a single enterprise or a system of enterprises (e.g., within a district or within a virtual enterprise system). The latest version of jES, together with complete user instructions, can be found here.

  Lsd: A Simulation Framework for Evolutionary Modeling (C++)

  A Laboratory for Simulation Development (Lsd) has been developed by Marco Valente (University of L'Aquila) for evolution simulation modeling, as exemplified by the famous Nelson-Winter (1982) model of Schumpterian competition in an industry or economy. Current Lsd applications take a systems dynamics (difference/differential equations) approach using replicator dynamics rather than a bottom-up agent-based approach, but the underlying use of C++ suggests that a more agent-based approach might also be possible. For an extended discussion of Lsd, see: M. Valente and E.S. Anderson, "A Hands-On Approach to Evolutionary Simulation: Nelson-Winter Models in the Laboratory for Simulation Development," The Electronic Journal of Evolutionary Modeling and Economic Dynamics, No. 1003, Issue 1, January 15, 2002, available online here.

  MAML: Multi-Agent Modeling Language (Swarm Extension)

  The Multi-Agent Modeling Language (MAML), developed by László Gulyás, Tamás Kozsik, and Sándor Fazekas at the Central European University (Budapest, Hungary), is a tool for agent-based simulation. In its current version, MAML is a macro-language for Swarm. It consists of several `macro keywords' that define the general structure of a simulation; the remainder must be completed with Swarm coding. However, MAML is also part of a larger Swarm-independent framework currently under development. For more information, visit the MAML Home Page. An article explaining MAML that appeared in the October 1999 issue of the electronic Journal of Artificial Societies and Social Simulation can be also be accessed.

  MASON: Multi-Agent Simulator (Java, Open Source)

  The George Mason University Evolutionary Computation Laboratory and Center for Social Complexity has announced a new release (MASON 11) of the MASON multiagent simulation toolkit. The new release is also being re-licensed under the Academic Free License version 3.0. It sports a new charting and tracking facility, several new problem domains, and a very large number of bug fixes and improvements. MASON contains both a model library and an optional suite of visualization tools in 2D and 3D. MASON is a joint effort between George Mason University's ECLab (Evolutionary Computation Laboratory) and the GMU Center for Social Complexity, and was designed by Sean Luke, Gabriel Catalin Balan, and Liviu Panait, with help from Claudio Cioffi-Revilla, Sean Paus, Daniel Kuebrich, and Keith Sullivan. A SwarmFest04 presentation on MASON can be accessed here.

  MATLAB (Proprietary)

  MATLAB is a high-performance language for technical computing. Information about MATLAB can be obtained at the MathWorks Website. An extensive list of Online MATLAB Resources has also been compiled by Jerod Parker of George Mason University. Warren Thorngate has an article titled Teaching Social Simulation with MATLAB that appeared in the online Journal of Artificial Societies and Social Simulation, Volume 3, No. 1, 2000. In this article, Thorngate explains why MATLAB is his programming language of choice for teaching simulation programming techniques to students new to simulation. A series of MATLAB Tutorials prepared by members of the Department of Mathematics at Southern Illinois University at Carbondale are also available online.

  Moduleco: Multi-Agent Social Simulation

  Moduleco is an object-oriented modular framework designed to simulate multi-agent social phenomena such as markets, organizations, network effects, and population dynamics. The developers are Denis Phan and Antoine Beugnard. For more information, including downloadable applications and bibliographical information, visit the Moduleco website above.

  NetLogo (Multi-Platform, Freeware)

  NetLogo, a descendant of StarLogo (see below), is a multi-platform general purpose complexity modeling and simulation environment from the Center for Connected Learning and Computer-Based Modeling (CCL), Northwestern University, Evanston, Illinois. NetLogo comes with a large library of sample models and code examples that help beginning users get started authoring models. NetLogo is in use by research labs and university courses across a wide variety of domains in social and natural sciences. A free download plus a users' guide can be obtained at the above NetLogo website.

  Repast (Java,Python,C#; Open Source)

  Repast (REcursive Porous Agent Simulation Toolkit) is an agent-based simulation toolkit specifically designed for social science applications. Originally developed by researchers at the University of Chicago and the Argonne National Laboratory, Repast is now managed by the non-profit volunteer organization ROAD (Repast Organization for Architecture and Development). Repast is currently released in four versions supporting model development in three different languages: RepastJ (Java based); RepastPy (based on the Python scripting language); Repast.Net (implemented in C#, but any .Net language can be used); and Repast S (Simphony, Java-based, developer's alpha release 2). Repast runs on virtually all modern computing platforms (e.g., Windows, Mac OS, and Linux). The latest Repast releases, along with detailed technical information regarding the installation and use of RePast, can be found at the RePast Sourceforge Website.

  Leigh Tesfatsion (Economics, Iowa State University, Ames, IA) has prepared a RePastJ Self-Study Guide to help newcomers get started programming with RepastJ (Repast for Java) in a Java Integrated Development Environment. Topics covered include: Introduction to Agent-Based Modeling; Introduction to Agent-Oriented Programming; Introduction to Java; Getting Acquainted with RePastJ; Programming with RePastJ; and Possible RePastJ Modeling Application Areas. Extensive links are provided to on-line resource materials. Although some prior programming experience is desirable, the study guide does not presume such experience.

  SDML: Strictly Declarative Modeling Language (SmallTalk)

  The Strictly Declarative Modeling Language (SDML) is a modeling language implemented in SmallTalk by Steve Wallis in consultation with other members of the Centre for Policy Modeling at the Manchester Metropolitan University. Founded in 1992 by Scott Moss, the Centre stesses computational multi-agent modeling of decision-making in complex environments, with a focus on strategic behavior by corporate managers and government.

  • As detailed at the main SDML site (above), SDML is available without charge for use in academic research. Discussion papers and a tutorial describing SDML and its applications are also available at this site.
  • The learning curve for SDML can be very steep; a background in functional (e.g., LISP) and declarative (e.g., PROLOG) languages takes one a long way up this learning curve.
  • The Centre for Policy Modeling collaborates with a number of research groups in Europe who use SDML -- e.g., at Namur in Belgium, Paris, and Munich.

  SimBioSys: A C++ Framework for Agent-Based Evolutionary Simulations (Open Source)

  SimBioSys, is a C++ class framework developed by David McFadzean (Master's Thesis, University of Calgary, 1995) for general agent-based evolutionary simulations in both biology and the social sciences. SimBioSys is designed to support simulations comprising the following four features:

  • A world defining the virtual environment where the simulation occurs;
  • Populations of autonomous agents inhabiting the world;
  • Programs driving the behavior of the agents;
  • Genetic mechanisms emulating natural selection which act on the agents' programs.

  The Master's Thesis and a source code zip file (32K) for the entire SimBioSys class framework have been released by David McFadzean (the copyright holder) as freeware under the terms of the Artistic License Agreement.

  SME: Spatial Modeling Environment

  Thomas Maxwell, Ferdinando Villa, and Robert Costanza, all with the International Institute for Ecological Economics (Center for Environmental Science, University of Maryland System), have developed an integrated environment for high-performance spatial modeling called the Spatial Modeling Environment (SME). From the SME home page: "This environment, which transparently links icon-based modeling environments with advanced computing resources, allows modelers to develop simulations in a user-friendly, graphical environment, requiring no knowledge of computer programming. Automatic code generators construct (spatial) simulations and enable distributed processing over a network of parallel and serial computers, allowing transparent access to state-of-the-art computing facilities. The environment imposes the constraints of modularity and hierarchy in model design, and supports archiving of reusable model components defined in our Modular Modeling Language (MML)."

  Sociodynamica: Human Societies as Viewed by Adam Smith

  Karl Jaffe (Universidad Simón Bolívar, Caracas, Venezuela) has developed a software package titled Sociodynamica for the simulation of human societies as viewed by Adam Smith in The Wealth of Nations. To install Sociodynamica on your computer, download the zipped package PackSociodyn.zip from the above site. Expand the files and run Setup.exe which should guide you through the installation process. Once installed, the program will be available through your initial menu. When running it for the first time, you have to load a Demo file by activating the menu of ¨NewFiles¨ and choosing a file. The Help (or ?) menu will give you further guidance. It also contains the computer code used. Questions can be addressed to kjaffe AT usb.ve

  StarLogo (Freeware)

  StarLogo is a programmable modeling environment for exploring the workings of decentralized systems that has been specifically designed to be user-friendly for K-12 students. StarLogo can be used to model many real-life phenomena such as bird flocks, traffic jams, ant colonies, and simple market economies. Extensive support materials for StarLogo (tutorials, demos, users discussion group,...) are provided at the StarLogo website.

  StarlogoT (Freeware)

  StarlogoT, an extension of Starlogo available only for the Macintosh, is a programmable modeling environment for building and exploring multi-level agent-based systems. StarlogoT is designed for use by students and is released free of charge by the Center for Connected Learning and Computer-Based Modeling at Northwestern University, Evanston, Illinois. StarlogoT is one of a class of new "object-based parallel modeling languages" (OBPML). StarlogoT allows the user to control the behavior of thousands of objects in parallel. Each object has its own variable and state. This allows the user to model the behavior of distributed and probabilistic systems, often systems that exhibit complex dynamics.

  Swarm Simulation System (Objective C, Open Source)

  Swarm is essentially a collection of software libraries, written in Objective C, developed by researchers at the Santa Fe Institute for constructing discrete event simulations of complex systems with heterogeneous elements or agents. Some lower-level libraries, which interface with Objective C, are also written in Tk, a scripting language that implements basic graphical tools such as graphs, windows, and input widgets.

  TNG: A C++ Framework for Studying the Formation and Evolution of Trade Networks (Open Source)

  The Trade Network Game (TNG), implemented (open-source) in C++, combines evolutionary game play with preferential partner selection. Successive generations of resource constrained traders choose and refuse trade partners on the basis of continually updated expected payoffs, engage in risky trades modeled as two-person games, and evolve their trade strategies over time. The modular design of the TNG framework facilitates experimentation with alternative specifications for market structure, trade partner matching, expectation formation, and trade strategy evolution. The TNG framework can be used to study the evolutionary implications of these specifications at three different levels: trade network formation (who is trading with whom, and with what regularity); behaviors expressed by traders in trade partner relationships; and social welfare outcomes. The TNG source code and manual, together with research articles related to the TNG, can be obtained at the TNG Home Page.

  Vensim: System Dynamics Modeling (Proprietary, Freeware Learner's Edition)

  Ventana Systems, Inc., of Harvard, Massachusetts, was formed in 1985 for the purpose of developing large-scale simulation models that integrate both business and technical elements to solve difficult management problems. Ventana Systems now supports its own simulation language, called Vensim. From the Vensim home page: "Vensim is used for developing, analyzing, and packaging high quality dynamic feedback models. Models are constructed graphically or in a text editor. Features include dynamic functions, subscripting (arrays), Monte Carlo sensitivity analysis, optimization, data handling, application interfaces, and much more. ... Vensim PLE (Personal Learning Edition) is software that gets you started in system dynamics modeling and is free for educational use and inexpensive for commercial use. Vensim PLE is ideal for classroom use and personal learning of system dynamics."

  Z-Tree (Freeware)

  Z-Tree (Zurich Toolbox for Readymade Economic Experiments), developed at the Institute for Empirical Research in Economics at the University of Zurich, Switzerland, is a user-friendly software package that permits users with little programming knowledge to develop and carry out economic experiments. The software permits communication between computers, data saving, time display, profit calculations, and tools for screen layout. It can be used for a wide range of experiments, including public good experiments, structured bargaining experiments, and market experiments (e.g., double auctions and Dutch auctions). Z-Tree can be licensed and downloaded free of charge, along with a manual, and interested parties can join a users' mailing list.

Software and Toolkits for General CAS Modeling

• ABLE Framework (Java, Open Source)
  The Agent Building and Learning Environment (ABLE), a project made available by the IBM T. J. Watson Research Center, is a Java framework, component library, and productivity toolkit for building intelligent agents using machine learning and reasoning. The ABLE framework provides a set of Java interfaces and base classes used to build a library of JavaBeans called AbleBeans. The library includes AbleBeans for reading and writing text and database data, for data transformation and scaling, for rule-based inference using Boolean and fuzzy logic, and for machine learning techniques such as neural networks, Bayesian classifiers, and decision trees. Developers can extend the provided AbleBeans or implement their own custom algorithms. ABLE runs on any platform supporting Java 2. For more information, visit here.

  ACT-R: Cognitive Architecture (Lisp)

  From the ACT-R Research Group (Department of Psychology, Carnegie Mellon University): "ACT-R is a cognitive architecture: a theory about how human cognition works. On the exterior, ACT-R looks like a programming language; however, its constructs reflect assumptions about human cognition. These assumptions are based on numerous facts derived from psychology experiments. Like a programming language, ACT-R is a framework: for different tasks (e.g., Tower of Hanoi, memory for text or for list of words, communication, aircraft controlling), researchers create models (aka programs) that are written in ACT-R and that, beside incorporating the ACT-R's view of cognition, add their own assumptions about the particular task. These assumptions can be tested by comparing the results of the model with the results of people doing the same tasks. ... One important feature of ACT-R that distinguishes it from other theories in the field is that it allows researchers to collect quantitative measures that can be directly compared with the quantitative measures obtained from human participants." For more information, visit here.

  Ada for Agent-Based Simulation

  From Bruce R. Barkstrom (NOAA National Climate Data Center): "Ada, a general purpose programming language originally developed by the U.S. Department of Defence in 1983, appears to provide an appealing tool for developing agent-based software. The language has undergone two major revisions, one in 1995, and a second in 2005. An excellent open-source implementation is available with the GPL license at the AdaCore Site, from which it is possible to download both the GNAT GPL version and the GPS Integrated Development Environment, as well as numerous other libraries and toolkits. The reason Ada would appear to be an attractive language for agent-based simulations is that Ada defines a model for concurrent programming as part of the language itself. A task is an active component encapsulating a light-weight process and it provides a simple model for executing multiple code blocks concurrently - and for allowing different tasks to communicate and synchronize. In cases in which it is necessary for concurrent processes to avoid interference, Ada also provides protected entries and tasks. Because Ada has been designed to handle embedded, distributed systems, it also has excellent exception handling capabilities."

  AgentBuilder: Agent Construction Tools

  AgentBuilder provides an extensive annotated collection of pointers to agent construction tools. The tools are categorized as either commercially available products or academic and research projects. A brief summary is provided for each tool as well as a link to the provider's product description.

  Agent Development Kit (Java)

  From the developers: "Tryllian introduces the latest release of the Agent Development Kit (ADK), a mobile component-based development platform that allows you to build reliable and scalable industrial strength applications. The ADK features dynamic tasking, JXTA-based P2P architecture with XML message-based communication that supports FIPA and SOAP, JNDI directory services, using a reliable, lightweight runtime environment based on Java. These allow Java Developers to easily build, deploy and manage secure, large-scale distributed solutions that operate regardless of location, environment or protocol, enabling an adaptive, dynamic response to changes." The ADK is available for commercial license or for free evaluation to educational institutions under a research license program. For more information, visit the ADK Home Page.

  AgentSheets: Interactive Simulations (Java, Proprietary)

  AgentSheets is an authoring tool for building interactive simulations in Java. Key features stressed by the providers include: speed; no players or plug-ins; school hardware/software friendly; highly interactive; rich multimedia support; and collaborative support. For more information, visit the AgentSheets Website. Two articles that review the use of AgentSheets for teaching simulation to social science students can be found in Issue 3/3 (June 2000) of the online Journal of Artificial Societies and Social Simulation.

  Alife Software

  See the Alife software links maintained by the International Society for Artificial Life (ISAL).

  BlueJ: Interactive Java Environment

  From the development team (Monash University, Australia, and Maersk Institute, University of Southern Denmark): "The BlueJ environment was developed as part of a university research project about teaching object-orientation to beginners. ... The aim of BlueJ is to provide an easy-to-use teaching environment for the Java language that facilitates the teaching of Java to first year students. Special emphasis has been placed on visualization and interaction techniques to create a highly interactive environment that encourages experimentation and exploration." For more information, visit here.

  Boids Algorithm: Coordinated Animal Motion (Multiple Third-Party Programs)

  The Boids Website maintained by Craig Reynolds introduces and illustrates his model of coordinated animal motion, such as bird flocks and fish schools. The software implementing this model is called the Boids algorithm. The site also provides an extensive annotated linked list of related ongoing work, including movie applications such as the wildebeest stampede in the Lion King.

  Brahms: Multi-Agent Discrete-Event Simulation (Java based)

  From the developers: " Brahms, developed by the Brahms Team in the Computational Sciences Division at the NASA Ames Research Center, is a multi-agent discrete-event simulation environment. It is also an Agent-Oriented Language for implementing real-time distributed agents. There is an agent language construct that can inherit from multiple group constructs. This permits the modeling of teams of agents either interacting in one model or distributed over multiple models. Agents are belief-based (BDI) activity-oriented, and both deliberative and reactive. Besides agents, the Brahms language also includes constructs for objects and object-class inheritance for modeling of data objects and real world artifacts. Agents and objects are located in a conceptual geography model, enabling agent and object movement in this geography. The Brahms byte-code is XML, which is interpreted by the Brahms Virtual Machine. Each Brahms agent executes in a separate Java thread using a subsumption-based activity and rule execution engine. Multiple Brahms Virtual Machines can interact together via a network using a message- and directory-based communication layer. Agents can publish themselves and locate others on a network, using a distributed directory service. Agents interact via a message-based communication layer that can be based on any low-level communication protocol, such as Corba, UDP, TCP/IP, SOAP."

  Brahms can be downloaded at Agent iSolutions. A Tutorial on Brahms is also available.

  Breve: 3-D Simulation Environment (Open Source)

  Breve is a free software package that provides a 3-D environment for the simulation of decentralized systems and artificial life. Users define the behaviors of agents in a 3-D world and observe how they interact. Breve includes physical simulation and collision detection for the simulation of realistic creatures, and an OpenGL display engine so that users can visualize their simulated worlds. It is available for Mac OS X, Linux, and Windows platforms.

  Cellular Automata Lab (CelLab)

  From the CelLab User Guide: "The first edition of CelLab was developed by Rudy Rucker and John Walker in 1988 and 1989 when both were working in the Autodesk research lab... Celab allows you to explore cellular automata on your own personal computer, running under MS-DOS or Windows. You can define your own rules by writing short programs in Java, C, BASIC, or Pascal, create patterns of cells and color palettes, then run the rule and observe its evolution on the screen. We supply a wide variety of ready-to-run rules, simulating processes as varied as heat flow, diffusion of gases, annealing of metal, behavior of tubeworms on the ocean floor, chemical reactions, and ecosystems of artificial life. Complete source code for all of these rule definitions in included in both Java and Pascal, allowing you to use our rule definitions as the point of departure for your own experiments. Advanced users can customize the cellular automata simulator by writing custom evaluators in assembly language for DOS or Windows, or as a DLL written in C for the Windows-based simulator." Rudy Rucker is Professor of Mathematics and Computer Science at San Jose State University. John Walker is founder and former president of Autodesk, Inc.

  Cougaar (Java, Open Source)

  From UMBC AgentNews (v8n3): Cougaar is java-based software for facilitating the development of agent-based applications that are complex, large-scale, and distributed. The software includes not only the core architecture but also a variety of demonstration, visualization, and management components. It was developed as part of a multi-year DARPA research project into large scale agent systems.

  deX (C++, Freeware)

  deX is an object-oriented C++ framework for developing, analyzing, and visualizing dynamic agent-based and multi-body simulations. deX is built on top of a high-performance simulation engine designed to handle a large number of entities with high levels of event communication. deX includes tools for batch execution, optimization, distributed job execution, GUI controls, and real-time plotting/3D visualization using OpenGL.

  D-OMAR: Agent-Based Modeling Environment (Java and Lisp)

  D-OMAR provides a suite of open-source software tools to support the development of simulation and agent-based systems operating in a distributed computing environment. OmarJ is the new Java implementation of D-OMAR, and OmarL is the new name for the original LISP implementation of D-OMAR. OmarJ provides most of the features of OmarL with significant enhancements, including a much improved external communication layer that uses Jini for inter-node communication, and the ability to break out of simulation mode and run agents in a non-time-controlled environment. Developed by BBN Technologies, the D-OMAR project is sponsored by the Air Force Research Laboratory.

  Dynamical Analysis of Nonlinear Systems

  Marji Lines and Alfredo Medio (University of Udine, Italy) have made available an integrated, user-friendly, open-source software program developed specifically for the dynamical analysis of nonlinear models on Windows and Linux platforms. The available algorithms include: numerical simulations of single and multiple trajectories, with options for automatically varying initial values or parameter values; bifurcation diagrams for the study of limit sets over a single parameter or in a two-dimensional parameter space; calculation of the Lyapunov exponents over time either for a single parameter or in a two-dimensional parameter space; basins of attraction; stable and unstable manifolds; and absorbing basins.

  For source code, instructions, and exercises (including macro exercises written to accompany Romer's Advanced Macroeconomics), visit here.

  Echo: Ecological Modeling

  Echo is a simulation framework developed originally by John Holland and Terry Jones at the Santa Fe Institute to investigate mechanisms which regulate diversity and information-processing in complex adaptive systems, i.e., systems comprised of many interacting adaptive agents. Echo agents interact via combat, mating, and trade to develop strategies for ensuring survival in resource-limited environments. The result is complicated networks of interactions and resource flows that resemble species communities in ecological systems. The existing implementation of Echo runs on UNIX workstations and is available via ftp in a tarred compressed file (1085K), together with a documentation file (107K) by Terry Jones. See, also, a paper by Stephanie Forrest and Terry Jones titled "Modeling Complex Adaptive Systems with Echo" that appeared in Complexity International, Volume 2, 1995.

  Erlang: General Purpose PL for Distributed Applications

  Erlang is a general purpose programming language and run-time environment designed at Ericsson, a telecommunications company active in more than 140 countries that specializes in mobile phones and other communications tools. Erlang has built-in support for concurrency, distribution, and fault-tolerance, features critical for multi-agent applications. Open-source Erlang, in use in a number of Ericsson products, is being released free of charge to help encourage the spread of Erlang outside of Ericsson.

  Extreme Programming

  Don Wells maintains a site titled Extreme Programming (XP): A Gentle Introduction. XP is a deliberate and disciplined approach to software developement that stresses customer involvement and team work, following simple rules and practices. Another important issue emphasized by XP is not just testing, but testing well. Tests are automated and provide a safety net for programmers and customers alike. Tests are created before the code is written, while the code is written, and after the code is written. About eight years old, XP has been adopted at many variously sized companies and industries worldwide. This site provides a guided tour of XP.

  Genetic and Evolutionary Algorithm Toolbox (MATLAB, Proprietary)

  Paraphrased from the announcement: The Genetic and Evolutionary Algorithm Toolbox (GEATbx) for use with MATLAB is a powerful and widely applicable optimization tool using evolutionary algorithms. It is a fully integrated environment that runs on any MATLAB-supported platform (requires MATLAB 4.2 or 5.x).

  GoldSim: Monte Carlo Simulation Software for Decision and Risk Analysis (Proprietary)

  GoldSim is Monte Carlo simulation software for dynamically modeling complex systems in business, engineering, and science. GoldSim supports decision and risk analysis by simulating future performance while quantiatively representing the uncertainty and risks inherent in all complex systems.

  iGen: Cognitive Agent Software Toolkit (Proprietary)

  From the developer (CHI Systems, Inc., Pennsylvania, U.S.A.): iGEN is a set of software tools that enables users to develop, test and deploy cognitive agents. iGEN is based on the premise that software tools called cognitive agents can be developed from models of human expertise. This premise is supported in iGEN by COGNET (COGnitive NETwork of Tasks), a cognitive/behavioral analysis method which integrates concepts and constructs from human engineering, cognitive science, and artificial intelligence." Requests for more information about iGen should be directed to iGen@chiinc.com, or visit the Web site, above, for CHI Systems, Inc.

  JADE: Java Agent Development Framework (Java, Open Source)

  From the developers: " JADE (Java Agent DEvelopment Framework) is a software framework fully implemented in the Java language. It simplifies the implementation of multi-agent systems through a middle-ware that claims to comply with the FIPA specifications and through a set of tools that supports the debugging and deployment phase. The agent platform can be distributed across machines (which do not even need to share the same OS) and the configuration can be controlled via a remote GUI. The configuration can be even changed at run-time by moving agents from one machine to another one, as and when required. JADE is completely implemented in the Java language and the minimal system requirement is version 1.2 of JAVA (the run time environment or the JDK). ... JADE is free software and is distributed by TILAB, the copyright holder, in open source software under the terms of the LGPL (Lesser General Public License Version 2)."

  JAS: Java Agent-Based Simulation Library (Java, Open Source)

  JAS is a simulation toolkit specifically designed for agent-based simulation modeling. JAS is a Java-clone of the Swarm library orginally developed by researchers at the Santa Fe Institute. The core of the JAS toolkit is its simulation engine based on the standard discrete-event simulation paradigm, which allows time to be managed with high precision and from a multi-scale perspective. Many features of JAS are based on open-source third party libraries. JAS is freely available from the JAS Sourceforge site.

  Jason: Version of AgentSpeak (Java-based, freely available)

  Jason is a fully-featured freely-available Java-based interpreter for an extended version of AgentSpeak, a programming language for multi-agent systems. Jason is based on the BDI agent architecture and provides the features of complex PRS-style reactive planning systems. For additional information about Jason, see the following 2007 book from John Wiley: Programming Multi-Agent Systems in AgentSpeak Using Jason.

  Java Tutorial Online (Java/Sun)

  The Java Tutorial: A Practical Guide for Programmers, maintained by Sun Microsystems, Inc., is a practical online guide for programmers with hundreds of complete working examples and numerous pointers to basic information (running your first program, getting started, learning the Java language, etc.). The tutorial is organized into groups of basic and specialized lessons on various subjects: for example, getting started with Java; writing applets; essential Java classes; creating a GUI with JFC/Swing; custom networking; 2D graphics; and Java Beans. Hundreds of full working examples are included in these lessons.

  JCASim: Cellular Automata Simulation System (Java)

  From the developer (Joerg Richard Weimar, Institute of Scientific Computing, Technical University Braunschweig): "The program system JCASim is a general-purpose system for simulating cellular automata in Java. It includes a stand-alone application and an applet for web presentations. The cellular automata can be specifed in Java, in CDL, or using an interactive dialogue. The system supports many different lattice geometries (1-D, 2-D square, hexagonal, triangular, e3-D), neighborhoods, boundary conditions, and can display cells using colors, text, or icons." For more information, visit here.

  JESS: Java Expert System Shell (Java)

  From Sandia National Laboratories: Jess is a rule engine and scripting environment written entirely in Sun's Java language by Ernest Friedman-Hill at Sandia National Laboratories in Livermore, California. Jess was originally inspired by the CLIPS expert system shell, but has grown into a complete, distinct Java-influenced environment of its own. Using Jess, you can build Java applets and applications that have the capacity to `reason' using knowledge you supply in the form of declarative rules."

  Joone: Neural Network Framework (Java, Open Source)

  From the development team: "Joone is a neural net framework written in Java. It's composed by a core engine, a GUI editor and a distributed training environment. Can be extended writing new modules to implement new algorithms or new architectures starting from base components." For more information, visit here.

  JUNG: Java Universal Network/Graph Framework (Java, Open Source)

  Jung (Java Universal Network/Graph Framework) is a software library that provides a common and extendible language for the modeling, analysis, and visualization of data that can be represented as a graph or network. It is written in Java, which allows JUNG-based applications to make use of the extensive built-in capabilities of the Java API, as well as those of other existing third-party Java libraries. JUNG is freely available from the JUNG Sourceforge site.

  LEDA: Graph and Network Problems

  LEDA (distributed by Algorithmic Solutions Software GmbH, Saarbruecken, Germany) is a C++ class library for efficient data types and algorithms. LEDA provides algorithmic in-depth knowledge for graph and network problems, geometric computations, combinatorial optimization, and other applications. LEDA is implemented following the object-oriented approach. It is available in four different packages: basic, graph, geometry, and GUI. In addition, it is available for many different operating systems and compilers.

  Linux Documentation Project

  The Linux Documentation Project is maintained by a team of developers and volunteers in a variety of languages. The extensive resources provided at this site include: news items; specific-subject help; book pointers; answers to frequently asked questions; help on individual commands; and online magazine links. For more information, visit here.

  Linux Agent-Based Software Development Tools

  The Linux AI/Alife Mini HowTo website, maintained by John A. Eikenberry, provides pointers to an extensive repository of downloadable tools for the development of agent-based software applications. Specific topics covered at this website include languages, traditional artificial intelligence, connectionism, evolutionary computing, agents and bots, and artificial life and complex systems.

  Linux/Unix Simulation Software Links

  An annotated list of pointers to free discrete-event simulation software suitable for Linux and other Unix operating systems.

  MadKit (Java)

  From the development team: "Madkit is a Java programming environment dedicated to the creation of multi-agent systems. It is oriented towards communication between distributed systems. It is built upon an organizational model based on Agents, Groups, and Roles: an organization is viewed as a framework for activity and interaction through the definition of groups, roles, and their relationships. But, by avoiding an agent-oriented viewpoint, an organization is regarded as a structural relationship between a collection of agents. Thus, an organization can be described solely on the basis of its structure, i.e., by the way groups and roles are arranged to form a whole, without being concerned with the way agents actually behave, and multi-agent systems will be analyzed from the `outside,' as a set of interaction modes. The specific architecture of agents is purposely not addressed. Madkit provides general agent facilities (lifecycle management, message passing, distribution,...), and allows high heterogeneity in agent architectures and communication languages, and various customizations." For more information, visit here.

  MAS-SOC: Agent-Based Social Science Simulation

  A group of authors has developed a platform for multi-agent based social simulation (MAS-SOC), building on recent progress in the area of agent-oriented programming languages. The approach taken to building multi-agent based simulations includes the use of Jason (an interpreter for an extended version of AgentSpeak) and ELMS (a language for modeling environments with situated cognitive agents). For more information, see their June 2005 JASSS article titled "MAS-SOC: A Social Simulation Platform Based on Agent-Oriented Programming".

  MASS: Multi-Agent Simulation Suite (Specialized Language, Free)

  AITIA International Inc. has publicly released MASS, a multi-agent simulation suite for writing agent-based and participatory simulations, creating visualizations and experiments, and analyzing simulation data. MASS includes four key components: FABLES (Funtional Agent-Based Language for Simulations); CP (Charting Package); MEME (Model Exploration Module); and PET (Participatory Extension). The components of MASS are integrated, but behind the scenes they interact via a central "simulation core". In the first public release of MASS, this simulation core is Repast J, meaning that all FABLES models are compiled with Repast J.

  Mathtools.net

  The MathWorks, Inc., supports a free technical computing portal Mathtools.net that provides extensive annotated links to programming tools (MATLAB, Java, Excel, C/C++, Fortran, ...), application areas, and learning and educational resources.

  metaABM: Model-Driven ABM Development (Visual/Text-Based Languages, Open Source)

  metaABM is an Open Source (BSD) agent-based modeling meta-model and tool proving facilities for model representation, model editing, modeling of environments, and model implementation. metaABM defines and supports a high-level architecture for designing, executing and sytematically studying ABM models. metaABM started life as a component of the Repast Simphony system, "score", but its scope is beyond a single ABM tool. metaABM is not intended as an ABM engine or runtime environment, but as an approach that can leverage those environments in limitless ways. Beyond that, metaABM seeks to provide a common hub that enables developers of ABM tools to avoid duplication of effort and focus on the value that they can add to the overall software ecosystem. The contributors are committed to an open, developer-driven approach and welcome equal participation from other individuals, projects and organizations.

  Multimedia Programming Environment (Windows and Macintosh)

  From the developer (LCSI, Highgate Springs, Vermont): "MicroWorlds Pro allows students to create dynamic, interactive school and Internet projects using the most powerful Logo ever developed! It lets students become active web designers not just passive web viewers. Teachers and students can use MicroWorlds Pro to enhance their understanding of MicroWorlds and to get a real sense of the depth and breadth of this powerful multimedia programming environment. Helps develop creativity, problem-solving, and critical thinking skills. MicroWorlds Pro is so versatile it can be used in any subject area." MicroWorlds Pro is for Windows and Macintosh users. For more information, visit the MicroWorlds Pro Home Page.

  NASA: Nonlocal Automated Sensitivity Analysis (Open Source)

  NASA (Nonlocal Automated Sensitivity Analysis) is a Fortran program for tracking solution branches x(b) of parameterized nonlinear systems H(x,b)=0 over user-designated paths for the parameter b. The NASA program incorporates an "adaptive homotopy" smart-agent method for automated initialization as well as a fast and efficient algorithm FEED for automatic derivative evaluation. The NASA program is provided as open-source software under the terms of an Artistic License Agreement.

  Neural Network Toolbox

  The Mathworks, Inc., has released version 4.0.1 of its Neural Network Toolbox (NNT) for the design and use of artificial neural networks in various practical application settings (e.g., banking and finance, business, credit card activity checking, defense, engineering, electronics, entertainment, industrial, insurance, manufacturing, medical, oil and gas, robotics, speech, securities, telecommunications, and transportation). A printable version of the NNT user's guide is available online in pdf format that provides an introduction to neural networks, help with NNT installation, a discussion of NNT capabilities, and sample applications. For more information, visit http://www.mathworks.com/

  ORA: Social Network Analysis Tool

  News item paraphrased from announcement by Ram Murali (ram81@cs.cmu.edu): ORA is a social network analysis tool that enables the user to simultaneously reason about multiple networks connecting people, knowledge, resources, and tasks (or events). Both traditional and dynamic network measures are included. ORA can be used for risk assessment to locate individuals that are potential risks to the group or organization given one or more of the following types of relational or network information: social; knowledge; resource; and task/event. The GUI is used to set up organization(s) and perform two broad functions: run risk measures on the organization(s); and optimize the organizational structure. ORA is supported by CASOS, the Center for Computational Analysis of Social and Organizational Systems at Carnegie Mellon University directed by Kathleen M. Carley. Version 1.2 of ORA is now available for download at the CASOS Website

  Petri Nets

  Petri Nets is a graphical language appropriate for modeling systems with concurrency. It has been under development since the nineteen sixties, when Carl Adam Petri first formally defined the Petri Nets language. It is a generalization of automata theory in which the concept of concurrently occurring events can be expressed. The Petri Net World Website provides a variety of online services and source materials for the international Petri Nets community. These include introductory materials, tools and software packages which support Petri Nets, applications of Petri Nets, mailing lists, publications, newsletters, and conference information.

  PS-I (Open Source)

  Description paraphrased from the PS-I Sourceforge Website: PS-I (Political Science-Identity) is an agent-based modeling platform developed by Ian Lustick (Political Science, U of Pennsylvania) and Vladimir Derhachev (now with mindspring.com). The intent was to make available to political and other social scientists with no programming background a user-friendly computational environment for exploring political phenomena. PS-I is cross-platform, with binaries available for Win32. Features include: declarative language for model specification; industry standard Tcl/Tk scripting; built-in routine optimization, speculative evaluation, and xf86 JIT compiler that permit the creation of complex models without sacrificing performance; user-friendly interface; ability to save and restore program runs; ability to change model parameters on the fly; and data visualization. For additional introductory information about PS-I maintained by Ian Lustick, visit here.

  Python Language

  From the official Web site for the Python Language: "Python is an interpreted, interactive, object-oriented programming language. It is often compared to Tcl, Perl, Scheme, or Java. Python combines remarkable power with very clear syntax. It has modules, classes, exceptions, very high level dynamic data types, and dynamic typing. ... The Python implementation is portable: it runs on may brands of UNIX, on Windows, DOS, OS/2, Mac, Amiga... " For more information, visit the Python Home Page.

  Quicksilver: Agent-Based Simulation Environment (Java, Open Source)

  From the developer (Jan Burse, Zurich): "The goal of quicksilver is to provide a simple environment that allows the quick development and testing of agent models. The idea is that quicksilver cooperates with the Java environment in that it delegates the development of agent types and viewers to Java. Quicksilver itself then provides the editing of a so-called model tree, which contains instances of agent types. The model tree can be navigated and stepped. In both cases the viewers come into play." For more information, visit here.

  R: Statistical Computing and Graphics

  R is an open source programming environment with a broad user base in statistics and econometrics. It contains powerful graphing functions and a vast array of statistical routines. There are over 1000 add-on packages available; the ease of package development is the reason that new statistical methods tend to appear in R before other packages. Simple agent-based models can be programmed using vector-processing functions. Loops are available, but slow because R is interactive and does not compile code. R links into compiled C++ (or C or Fortran or Java) code, and can be called from other languages. Executables and open source code for Linux, Windows and MacOS can be downloaded and installed quickly from CRAN; check the mirrors for a site near you.

  Recursion Software (C++ and Java)

  From the developers (Recursion Software, Inc., Frisco, TX): "Recursion Software, Inc. is a provider of award-winning Java and C++ software solutions. These powerful middleware applications enable businesses to maximize the use of emerging technologies and processes. ... The basic Recursion Software suite of software solutions consists of: Voyager, an award-winning product line ... for quickly building high-impact distributed systems; C++ ToolKits; and JGL Libraries, a powerful add-on for the JDK providing a series of advanced collections as well as more than 50 genetic algorithms. (JGL Libraries) is licensed to over 250,000 users worldwide." For more information, visit the Recursion Software Home Page.

  SimAgent Toolkit (Open Source)

  From the developer (Aaron Sloman, School of Computer Science, University of Birmingham, UK): "The SimAgent Toolkit was developed within the Cognition and Affect Project at the University of Birmingham, UK. ... From our work exploring architectural design requirements for intelligent human-like agents, and other kinds, we need a facility for rapidly implementing and testing out different agent architectures, including scenarios where each agent is composed of several different sorts of concurrent interacting sub-systems, in an environment where there are other agents and objects. Some agents should have sensors and effectors, and some should be allowed to communicate with others. Some agents should have hybrid architectures including, for example, symbolic mechanisms communicating with neural nets. We also wanted to be able to use the toolkit for exploring evolutionary processes... As a result... a set of ideas for (the SimAgent Toolkit) emerged. The first draft was made available in October 1994 and since then there have been many extensions. ... The Toolkit uses the Pop-11 language in the Poplog software development environment." A detailed description of the SimAgent Toolkit, some uses of the Toolkit, and the Toolkit itself can be found at the SimAgent Toolkit Website.

  SimulAt (Licensed Software Tool)

  A team directed by Dr. Don Perugini at the Intelligent Software Development Pty Ltd (Mawson Lakes, South Australia) has developed a behavioural socio-economic simulation platform called SimulAt. The platform is based on cognitive agents (a technology used by Perugini in the department of defence for over 10 years). They have applied this technology to water trading, water pricing, water rebates, water restrictions, and for analysing competition between firms (in collaboration with Professor Steve Keen from the University of West Sydney). White papers, a research paper and other documents can be obtained at the above website. The team recently won two innovation awards for the application of this technology to the water industry.

  Software Tools for Discrete Dynamical Networks Research

  Andy Wuensche (Santa Fe Institute, New Mexico) has developed a Discrete Dynamics Lab Web site that provides software tools for researching discrete dynamical networks, including cellular automata and random Boolean networks. These software tools are provided as free shareware for personal non-commercial users for running on UNIX/XWindows/Sun, Linux/PC, and DOS/PC platforms.

  Virtual Reality Modeling Language (VRML)

  From Bob Crispen, the developer of the VRMLworks site: "The 3D Web is here. The technology that's making it happen today is Virtual Reality Modeling Language (VRML). You can get started on the 3D Web right now. That's what the VRMLworks is here for -- from picking a free browser, to visiting some of the worlds and virtual communities on the Web, to building your own worlds, to populating those worlds with free 3D models, to books, tutorials, tools, and resources, the VRMLworks is here to help."

  Virtual Reality Toolbox (MATLAB and Simulink)

  The Virtual Reality Toolbox, from The MathWorks, is a solution for visualizing and interacting with dynamic systems in a 3-dimensional virtual reality environment. These dynamic systems are described with MATLAB (a language for technical computing) and Simulink (model-based and system level design).

  VSEit: Versatile Simulation Environment (Java)

  Kai-H.Brassel has developed the Java-based VSEit framework " VSEit that strikes a balance between offering sufficient flexibility for free exploration of complex problem domains and effective measures to relieve the modeler from the more cumbersome parts of programming. One key element of the VSEit architecture is the supplementation of the usual object-oriented class concept with the capability for specifying types of model entities and structures at a high semantic level. For more information, see his June 2001 JASSS article titled "Flexible Modelling with VSEit, the Versatile Simulation Environment for the Internet".

  ZEUS (Open Source)

  The ZEUS toolkit, developed by British Telecommunications (BT), provides a library of software components and tools that facilitate the rapid design, development, and deployment of agent systems. The three main functional components of the ZEUS toolkit are an agent component library, agent building tools, and visualization tools.

Copyright © 2009 Leigh Tesfatsion. All Rights Reserved.