Полезные ссылки:
Каталог крупнейшего в России архива свободно-распространяемых программ и систем
Библиотека численного анализа НИВЦ МГУ
Библиотека алгоритмов AlgLib
Netlib - collection of mathematical software, papers, and databases
EISPACK - collection of Fortran subroutines for computation the eigenvalues and eigenvectors of some classes of matrices
LAPACK - Linear Algebra PACKage for solving systems of linear equations and eigenvalue problems
LAPACK++ - Linear Algebra PACKage in C++ for solving systems of linear equations on high performance computers
SLATEC - Common Mathematical Library, containing general purpose mathematical and statistical routines
FLTK - cross-platform C++ GUI toolkit for UNIX/Linux (X11), Microsoft Windows and MacOS
GAMS - cross-index and virtual repository of mathematical and statistical software components
DISLIN - high-level plotting library for displaying data
Scilab - scientific software package for numerical computations providing a powerful open computing environment
Octave - high-level language and tools, intended for numerical computations
R-project - language and environment for statistical computing and graphics
Fortran Library - a free scientific and technical programming resource
The Fortran Company - products, services, and general information related to the Fortran