FsFast (FreeSurfer Functional Analysis Stream) provides a set of tools for fMRI data analysis. The analysis results from FsFast can be visualized in the anatomical volume using TkMedit and on the surface using TkSurfer.
Version 5 Documentation: [http://nmr.mgh.harvard.edu/~greve/fsfast.intro.ppt Power Point Slides]
Version 4 and 4.5 documentation: