Idsia.ch
Idsia.ch
http://www.idsia.ch/~andrea/simtools.html#libraries
Mathworks
The mathworks is the world’s leading developer of technical computing software for engineers and scientists in industry, government, and education
http://www.mathworks.com/
Ni
Ni leverages commercial technologies, such as industry-standard computers and the internet, to deliver customer-defined automation, test and measurement hardware and software solutions for engineers and scientists.
http://www.ni.com/
Octave
Octave
http://www.octave.org/
Scilab
Scilab home page
http://www.scilab.org/