Diffusion and fluorescence simulation package. Works on Linux, Mac OS X, and probably Windows (at least used to, some time ago)
Download & unzip the package. then run $ make
$ cp fluor simulation_directory/
$ cd simulation_directory/
Edit configuration file: config.dat
Simulate diffusion and fluorescence
$ ./fluor -f
Calculate the correlation function
$ ./fluor -b
The output appears in corr.dat .