SciLab
Scilab is a scientific software package for numerical computations providing a powerful open computing environment for engineering and scientific applications. It is distributed freely via the Internet (and is open source).
R-Project
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.
R is available as Free Software under the terms of the Free Software Foundation's GNU General Public License in source code form. It compiles and runs on a wide variety of UNIX platforms and similar systems (including FreeBSD and Linux), Windows and MacOS.
OpenOffice
OpenOffice.org is a multi-platform office suite that is free to download and use. Version 2 includes a word processor (Writer), a spreadsheet tool (Calc), a presentation program (Impress), a graphics package (Draw) and a database (Base). It is able to read and write a large variety of formats, including those used by Microsoft Office.
