A comprehensive spline curve function library for creating and evaluating splines in Excel, VB and VBA. Free download of evaluation copy.

A software package for calibration, data analysis, image display, plotting, etcetera on astronomical data.

Astronomical computations and mathematical functions source programs in C. Home page of the Cephes Mathematical Library.

Resources: Acoustics, Laplace and Helmholtz Problems. Book, manuals, Fortran software (Free and to purchase).

A standard fortran 77 package for solving large-scale nonlinearly constrained optimization problems. Free download by FTP.

Software for nonlinear programming.

Identify potential solution algorithms for your problems.

Basic presentation of the discrete Fourier series transform. Explanations and formules. Raw source code to calculate numerical Fourier transforms.

Used to identify parameters in explicit model functions, dynamic systems of equations (steady-state), Laplace transforms, ordinary differential equations, differential algebraic equations and one-dimensional partial differential equations. Proceeding from given experimental data. For example, observation times and measurements, the minimum least squares distances of measured data from a fitting criterion are computed, that may depend on the solution of the dynamic system.

Free general PDE solver driven by a user friendly language. Both a 2D and a 3D version are available. MacOS, Windows.

Software for high-performance computers available in source form for problems in numerical linear algebra, specifically dense, sparse direct and iterative systems and sparse iterative eigenvalue problems.

High-level language, primarily intended for numerical computations that is mostly compatible with Matlab. History, news, documentation, and downloads.

Central location for custom scripts, functions and extensions to GNU Octave.

Freeware used to solve optimization problems with several real and binary parameters and non linear objective functions and constraints. Includes illustration of program and links to the author's other webpages.

HSL (formerly the Harwell Subroutine Library) is a collection of ISO Fortran codes for large scale scientific computation, written by members of the Numerical Analysis Group and other experts. Free download by FTP.

This private website is entirely dedicated to sources in numerical analysis in four languages: Basic, C++, Fortran and Pascal in Microsoft Windows environment.

Numerical, statistical, and signal processing subroutine libraries optimised for OS/2 platforms.

Algorithm for the numerical integration of systems of ordinary differential equations arising in chemical problems. C ocde, free to use.

Graph, mesh, and hypergraph partitioning software. Free download, portable on most Unix systems that have an ANSI C compiler (e.g. GNU C).

Visualization software developed at MIT.

Searchable repository of free numerical software.

Emphasis is on the kind of operations needed in statistical calculations such as least squares, linear equation solve and eigenvalues.

Notes and Fortran code on topics including: Finite elements, finite differences, boundary elements, integral equation methods, optimisation,linear systems, numerical integration, ODEs.

VectorSpace C++ Library for advanced numerical computation such as constrained optimization, variational methods, and computational mechanics.

A Java-Applet/Application for solving ODE systems.

The Reactor Simulation Editor (rsedit) is a software package designed to solve finite difference equations in a simplified way. The tool kit includes: a geometry editor, data structure editors, equation editor and an HTML output library.

FORTRAN programs for solving Sturm--Liouville equations.

Software and Algorithms for linear and nonlinear inverse Problems: Computerized tomography, wavelet applications, statical computations, multi parameter fit and more

Software for complex three dimensional surfaces.

The tensor language. Scientific computing language and environment.

Test problems, experimental results from a number of proven solvers, solvers, subroutines providing a common interface and links for Initial Value Problems for ODEs, DAEs and IDEs.

Will Naylor's free, unrestricted ANSI-C subroutine library including numerical routines such as conjugate-gradient and conjugate-directions, simplex method, transportation problem, fast-Fourier transform, matrix and vector operations.

An implementation of lazy exact real arithmetic in C by Keith Briggs.