I have just found these tools. They are like Octave:
JMathLib: A Java clone of Octave: http://mathlib.sourceforge.net/
FreeMat: is a free environment for rapid engineering and scientific prototyping and data processing. It is similar to commercial systems such as MATLAB from Mathworks, and IDL from Research Systems, but is Open Source. FreeMat is available under the GPL license:
http://freemat.sourceforge.net
Acabo de encontrar otras herramientas similares a Octave:
JMathLib: Es un clon de Octave escrito en Java: http://mathlib.sourceforge.net/
FreeMat: Ídem a Octave, pero usando otra filosofía: http://freemat.sourceforge.net
