In 2013, the Optics in Medicine Laboratory released the Monte Carlo GEANT4/GAMOS Tissue Optical Modeling software. This is described in a publication in Biomedical Optics Express, 2013. Useful information and downloads related to this are located here:
Unix: To install, download GAMOS_INSTALL.tar.gz from the link above. Unpack the directory with, “tar -xvf GAMOS_INSTALL.tar.gz”. Enter the scripts directory with “cd ./scripts”. Then compile the package with “source ./installGamos.sh INSTALL_DIR” where INSTALL_DIR is the absolute path to where you would like to install GAMOS, e.g. ~/GAMOS.
Windows: Not currently supported.