The paper:

Richert M, Nageswaran JM, Dutt N, Krichmar JL (2011) An efficient
simulation environment for modeling large-scale cortical
processing. Front Neuroinform 5:19

contains a link to the source code for their simulator:

http://www.socsci.uci.edu/~jkrichma/Richert-FrontNeuroinf-SourceCode.zip

It compiles under linux and requires an NVIDIA Cuda Driver and SDK to
be installed.