RLaB, an opensource project (GPL) since 1990 has moved its web site to Sourceforge (http://rlab.sourceforge.net). RLaB is a very high level programming language for scientific and engineering applications. RLaB can be considered a matrix and linear algebra oriented language. It has been used for a variety of applications from statistics to DSP to large scale structural simulations. The core of RLaB is written in C, making it fairly portable. It has been ported to so many platforms I have lost count. Most recently, it was ported to QNX by Boeing for on-orbit data analysis on the Space Station.
I would like to thank the sponsors of Sourceforge for this resource!