COGENT
   A graphical environment for cognitive modeling. Free for the moment, and available for PC and Unix. Developed by Rick Cooper, John Fox and others.
   http://cogent.psyc.bbk.ac.uk/

Causal and Statistical Reasoning
   Software and information for exploring perceptions of causality.
   http://www.phil.cmu.edu/projects/csr/

Life Science Associates
   Publisher of psychology software offering programs for cognitive rehabilitation.
   http://lifesciassoc.home.pipeline.com/

MLPest, PsychoFit, etc.
   Free software (Win/Mac) for analyzing psychophyisical data. By Lewis O. Harvey, Jr.
   http://psych.colorado.edu/~lharvey/

Psychophysics Toolbox
   Software allows the use of Matlab to do vision research.
   http://psychtoolbox.org/

TarrLab Stimuli
   Collections of pictures of familiar and novel objects, faces and geons.
   http://alpha.cog.brown.edu:8200/stimuli

VIAT
   A Windows program for demonstrating visual-attention phenomena (freeware)
   http://www.uni-konstanz.de/FuF/SozWiss/fg-psy/ag-kog/viat.htm