What to download?
Curious first time user?
Download UniSim installation for your platform (currently only Windows is supported by UniSim).
Wanting to know more about how it works?
Download in addition the UniSim tutorial and the UniSim source code package. Follow the instructions in the tutorial to find out where to unpack the source code and how to navigate it.
Wanting to understand UniSim in depth and develop own UniSim plug-ins?
Same as above, but in addition you will need to download and install a few open-source tools. Follow the instructions in the tutorial.
UniSim installation for Windows
This installation file will install Universal Simulator on your Windows computer. The installation includes a ready-to-run UniSim program. Included are plug-ins with models for the examples in the tutorial: an insect model, annual weed population dynamics, the conductance model for plant competition and a phenology model for Ambrosia artemisiifolia. An implementation of the INTERCOM model for plant growth and competition is in preparation.
Download: UniSim version 1.29 (4 October 2011)
UniSim source code package
You need the source code if you want to study and understand the exact functionality of the models included with UniSim. The source code is not included in the downloads above. The source code package includes instructions on how to program (in C++) your own plug-ins for UniSim.
The source code is placed at the GitHub web site. To get the latest source code package, visit UniSim at GitHub and download the latest zip package.
Download: UniSim at GitHub
How to cite
To cite the source of the UniSim software write: 'Universal Simulator 1.21 (2010), www.ecolmod.org'. State the version number and year corresponding to your version. You can find it under the Help|About menu of UniSim.
In academic work please also refer to 'Holst, N. (2010). WeedML: a tool for collaborative weed demographic modeling. Weed Science 58: 497-502'.