Tiago Freire

"Let's think the unthinkable, let's do the undoable, let's prepare to grapple with the
             ineffable itself, and see if we may not eff it after all."
                                                Douglas Adam's "Dirk Gently's Holistic Detective Agency"

Software Guide - from the Economics Network, part of UK's Higher Education Academy

Econometrics

Econometrics Journal - List of Econometric Software
Econometric Software - Econometric package information
NABE - Tools for economics and finance


Experimental Economics

Economic Science Laboratory - Free software for experimental economics
Laboratory for Experimental Economics and Political Science - free software


Free Software for Economists

R - statistical package similar to S and S-Plus (this software is command line based yet there are free graphical add-ons, such as R-Commander)
PSPP - free version to run SPSS code
gretl -  Gnu Regression, Econometrics and Time Series Library
MuPAD - software for mathematical computation
Octave - for mathematical computation compatible with Matlab
OxGAUSS - A free version of GAUSS software for time series regressions
OpenBUGS - An open source version of WinBUGS
TeXmacs - free WYSIWYG software for writing in LaTeX. Compatible with R, MuPAD and Octave among others.