Scilab is a scientific software package for numerical computations in a user-friendly environment. Main features * Hundreds of mathematical functions * High level programming language * 2-D and 3-D graphics * Advanced data structures and user defined data types * Xcos: hybrid dynamic systems modeler and simulator 2-D and 3-D visualization * Lines * Pie charts * Histograms * Surfaces * Animations * Graphics export in many formats: GIF, BMP, JPEG, SVG, PDF... Numerical computation * Linear algebra * Sparse matrices * Polynomials and rational functions * Simulation: explicit and implicit systems of differential equations solvers * Classic and robust control * Differentiable and non-differentiable optimization Data analysis * Interpolation, approximation * Signal Processing * Statistics Extended features * Graphs and Networks * Interface with Fortran, C, C++, Java * Functions for calling Scilab from C, C++, Fortran and Java * LabVIEW Gateway * A large number of modules available via ATOMS WWW: http://www.scilab.org