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NetLogo is a multi-agent programmable modeling environment. It is used by tens of thousands of students, teachers and researchers worldwide. It also powers HubNet participatory simulations. It is authored by Uri Wilensky and developed at the CCL. You can download it free of charge. NetLogo can run simulations for various phenomena, providing 3D modeling tools and multiple visualization options. Generated models can be exported locally, turned into a movie or saved as applets and used in the educational process, while the integrated API enables developers to integrate NetLogo into their projects. Each model you load or create simulates situations that depend on one or multiple variables, which you can adjust to view the results. For instance, climate change hinges on factors such as the sun brightness, cloud presence, the CO2 amount or the albedo (reflection coefficient).


FEATURES:

Programming:
Fully programmable
Approachable syntax
Language is Logo dialect extended to support agents
Mobile agents (turtles) move over a grid of stationary agents (patches)
Link agents connect turtles to make networks, graphs, and aggregates
Large vocabulary of built-in language primitives
Double precision floating point math
First-class function values (aka tasks, closures, lambda)
Runs are reproducible cross-platform
Environment:
Command center for on-the-fly interaction
Interface builder w/ buttons, sliders, switches, choosers, monitors, text boxes, notes, output area
Info tab for annotating your model with formatted text and images
HubNet: participatory simulations using networked devices
Agent monitors for inspecting and controlling agents
Export and import functions (export data, save and restore state of model, make a movie)
BehaviorSpace, an open source tool used to collect data from multiple parallel runs of a model
System Dynamics Modeler
NetLogo 3D for modeling 3D worlds
Headless mode allows doing batch runs from the command line
Display and visualization:
Line, bar, and scatter plots
Speed slider lets you fast forward your model or see it in slow motion
View your model in either 2D and 3D
Scalable and rotatable vector shapes
Turtle and patch labels