A free trial version of the SimSeg Learning Edition can be downloaded from the website: http://simseg.com/download/index.htm and the site also provides a useful review article of theoretical perspectives on residential segregation in American urban areas along with other resources.
If you interested in segregation, there are a whole host of other models available on the internet. For example Schelling Segregation Model created by Chris Cook, written is C# (the source code is available), A java applet created by Raj Singh, A NetLogo model or a Repast model created byGirardin et al., (2006) .
Fossett, M. and Senft, R. (2004), 'SIMSEG and Generative Models: A Typology of Model-Generated Segregation Patterns', Proceedings of the Agent 2004 Conference on Social Dynamics: Interaction, Reflexivity and Emergence, Chicago, USA, pp. 39-78, Available at http://www.agent2005.anl.gov/Agent2004.pdf