jECHO, created by Brian McIndoe is a new version of the ECHO model of a Complex Adaptive System (CAS) described by Holland using Repast. The aim of the research was to seek insights into CAS behavior in an attempt to evaluate ECHO model mechanisms and properties.
Brian McIndoe site also contains a copy of the Masters dissertation which describes the analysis, design and implementation of jECHO plus some experimentation and references.
The original source code for the model can be found and downloaded by clicking here
Alternatively, to run a verision of the model click here (Sorry it will only work in Windows). For instructions on how to run a Repast model see the Repast website.