Draco

Draco Econometrics

The open-source statistics package with an easy-to-understand interface

Draco is an open-source econometric solution, providing functionality available in popular statistics packages without high purchasing and licensing costs. Draco presents a familiar, yet powerful, user interface to improve efficiency.

http://approximatrix.com/products/draco

Draco 1.4 Windows

The R Project for Statistical Computing

The R Project for Statistical Computing

Introduction to R

R is a language and environment for statistical computing and graphics. It is a GNU project which is similar to the S language and environment which was developed at Bell Laboratories (formerly AT&T, now Lucent Technologies) by John Chambers and colleagues. R can be considered as a different implementation of S. There are some important differences, but much code written for S runs unaltered under R. ...

http://www.r-project.org/

Gretl

Gnu Regression, Econometrics and Time-series Library

Is a cross-platform software package for econometric analysis, written in the C programming language. It is is free, open-source software. You may redistribute it and/or modify it under the terms of the GNU General Public License (GPL) as published by the Free Software Foundation.

http://gretl.sourceforge.net/

Download Gretl 1.9 Windows

Daniel's XL Toolbox - Free and Open-Source Add-In for Excel

Daniel's XL Toolbox - Free and Open-Source Add-In for Excel

Daniel's XL Toolbox is a free, open-source add-in for Excel® that helps you to analyze and present data.