GNU General Public License (GPL) Yes NITRC PsychoPy FreeBSD, Linux, MacOS, Windows Yes Python PsychoPy - Psychology software in Python. PsychoPy is an open-source application to allow the presentation of stimuli and collection of data for a wide range of neuroscience, psychology and psychophysics experiments. It is intended as a free, powerful alternative to Presentation or e-Prime. PsychoPy English, Console (Text Based), Win32 (MS Windows), 4 - Beta, FreeBSD, Linux, Developers, End Users, MacOS, Python, Windows, Autistic Disorder, Dyslexia, Child Development Disorders, Pervasive, Brain Injuries, Schizophrenia, Parkinson Disease, Depression, MR, Experimental Control, GNU General Public License (GPL),