NumPy and SciPy are open-source add-on modules to Python that provide common mathematical and numerical routines in pre-compiled, fast functions.
License: Open Source
SciPy and NumPy are powerful libraries for scientific computing in Python, with a strong emphasis on performance and versatility, while Scilab offers a MATLAB-like environment that is user-friendly but may lack the depth of functions found in SciPy. Each tool serves different user needs, with SciPy and NumPy being ideal for complex mathematical algorithms and Scilab being suitable for those who prefer a graphical interface.