The purpose of this page is to provide you with information on add-on modules or free codes for spatial statistics that require other packages to run.
R is a free clone of S+. You can get more information about it at http://www.r-project.org/. R is growing so quickly that there is no way to keep this section exhaustive and up to date. I therefore can only invite the visitors to visit this two web sites dedicated to R for spatial statistics: "R Spatial Projects" and the "CRAN task view: Analysis of Spatial Data".
Here below are indicated a few well known packages.
ADE4 (analysis of lattice data, designed for ecological data-analysis)