S has become the defacto standard computing environment for the statistical research community, or the closest that we have to such a thing. Developers of Statgraphics for Windows. This company has recently been acquired by MathWorks. Producers of S-Plus, MathCad and Axum. Australian distributors of S-Plus.
Site includes archive of user contributed software.
Not public domain. Hartmut Pohlheim, Andrew Chipperfield, Carlos Fonseca, Peter Fleming. Developers of AssiStat, an educational and psychological statistics software package. Teaching package for the Mac. Doug Stirling, Massey University.