pygsl - A Python interface for the GNU scientific library. [Open Source, GPL/LGPL] PyGiNaC - A Python interface to the C++ library GiNaC (an open framework for symbolic computation within the C++ programming language). [Open Source, LGPL] QuantLib - A free/open-source library for quantitative finance. [Open Source, BSD-like] R/SPlus - Python interface to the R system for statistical computing and graphics. [Open Source, BSD-like] SciPy - Open Source Library of Scientific Tools. SciPy supplements the popular Numeric module, gathering a variety of high level science and engineering modules together as a single package. Within SciPy are modules for graphics and plotting, optimization, integration, special functions, signal and image processing, genetic algorithms, ODE solvers, and others. [Open Source, BSD-like] GMPY - Provides multiprecision arithmetic functionality to Python programmers. [Open Source, LGPL] Multipack Home Page - Collection of FORTRAN routines interfaced with NumPy. Provides interactive data analysis environment comparative to MATLAB, Octave, Scilab, etc. built on Python. NURBS - Non Uniform Rational B-Splines - NURBS algorithms in use for naval architecture. ScientificPython - A collection of Python modules that are useful for scientific computing. [Open Source, LGPL] FixedPoint.py - Python code module for fixed point decimal calculations. mxDateTime - Date and Time types for Python. [Open Source] MatPy - Python package for numerical computation and plotting with a MatLab-like interface.