DMDX is a free experimental software developed by Jonathan Forster at the University of Arizona. It can be used to measure reaction times, e.g. in priming or self-paced reading experiments.

E-Prime provides an easy-to-use environment for computerized experiment design, data collection, and analysis. It can be used together with eye-tracking devices and more. E-Prime is a product of Psychology Software Tools.

G*Power is a freeware program that helps you calculate your statistical power (U Düsseldorf).

Ibex farm is a free experimental software perfect for web-based experiments. It can be used to measure reaction times.

Linger is a free experimental software, primarily designed for self-paced reading. Note: You will also need to install 'ActiveTcl' for linger to work.

Mix and Match is a tool for pseudo-randomising stimuli and for matching experimental conditions (MRC Cognition and Brain Sciences Unit, Cambridge).

MouseTracker is a free software (you have to register) that measures real-time hand movements.

OpenSesame is a program to create experiments for psychology, neuroscience, and experimental economics.

Pangea is a power analysis program for general ANOVA designs.

PEBL: The Psychology Experiment Building Language. PEBL can be used to create experiments from scratch but there are also batteries of psychological tests implemented in PEBL that are free of use (it comes with 80+ standard psychology tests, such as Flanker, ANT, Corsi Blocks, Stroop, Spatial Cuing, etc.). It runs on Windows and Mac OS.

Praat is a very useful software program to edit auditory material. It was developed by Paul Boersma and David Weenink at the University of Amsterdam.

Here you can download R.

R Studio is a user interface for R.

SoSci Survey can be used for web-based questionnaires.

SurveyAnyplace focusses on interactive, mobile and offline surveys, for a free subscription for the Professional Plan drop an email at info@surveyanyplace.com.

Quick-R is a help page for R users.