Collection of Fortran 77 routines that address many traditional areas of mathematical software, including approximation, ordinary and partial differential equations, linear algebra and eigensystems, optimization, quadrature, root finding, special func...

Generators for linear ordering and clustering problems, by John E. Mitchell.

Programs for aeronautical engineering, many from NASA or USAF, complete with public domain source code, instructions and sample cases on CD-ROM. [Commercial]

Codes for multiple precision arithmetic, uniform and normal random number generators, irreducible/primitive trinomials, and parallel sorting. Released under the GNU General Public License.

Shareware by Stephen Kirkup.

Code for partial differential equations, quadrature, and the solution of linear systems, with associated papers.

Easy Inter-Process Shared Memory Communication Utilities for Win32 using a simple Fortran 77-style interface. Written for Compaq Visual Fortran by Gary Scott.

Bvls.f solves least-squares problems with bounds on the variables. Qr.f computes QR decompositions in a stable way. Sbl1.f finds bounds on linear functionals of an n-vector subject to an l1 constraint on the misfit to a set of linear relations, and li...

Fortran 77 codes to solve the quadratic equation, solve a nonlinear equation using the Newton-Raphson method, fit a simple linear regression, and solve a system of equations using Gaussian elimination.

Astronomy software, much in Fortran.