Generalized Simulated Annealing
- Site discusses algorithm and has link to zip file with Fortran 77 code.
- http://www.unb.br/iq/kleber/GSA/artigo2/node2.html

Experimental and Agent-Based Computational Economics
- Fortran 77 programs for the Repulsive Particle Swarm, Differential Evolution, Real coded Genetic Algorithm, Simulated Annealing, and Generalized Simulated Annealing methods. Code for fittting the logarithmic spiral and for the Maximum Entropy Leuven Estim
- http://www1.webng.com/economics/

TANGO Project
- Fortran 77 routines for Optimization developed at the Department of Applied Mathematics of the State University of Campinas and at the Department of Computer Science of the University of São Paulo, under the coordination of Professor J. M. Martínez. Onl
- http://www.ime.usp.br/~egbirgin/tango/index.php

SUBPLEX
- Subspace-searching simplex method for the unconstrained optimization of general multivariate functions, generalizing the Nelder-Mead simplex method.
- http://www.netlib.org/opt/subplex.tgz

Discrete Linear Optimization
- Fortran 90 code by Richard J. Hanson to solve knapsack problems with bounds.
- http://www.vni.com/corner/garage/hanson/knapsack.html

Nonsmooth optimization subgradient method with variable metric and stepsize control
- Fortran 77 code by S. P. Uryasev. A similar code is at http://www.ise.ufl.edu/uryasev/varg.txt .
- http://www.ise.ufl.edu/uryasev/varf.txt

MINPACK-2
- Optimization algorithms and software for high-performance computers. The software includes subroutines for the solution of systems of nonlinear equations, nonlinear least squares problems, and minimization problems. Code can be downloaded from ftp://info.
- http://www-fp.mcs.anl.gov/otc/minpack/summary.html

Pikaiai
- General-purpose optimization subroutine based on a genetic algorithm, in Fortran 90.
- http://users.bigpond.net.au/amiller/pikaia.zip

Differential Evolution
- Fortran 90 code implementing the Differential Evolution method, a simple but powerful population-based, stochastic function minimizer.
- http://www.icsi.berkeley.edu/~storn/DE_FORTRAN90.f90

Constrained and Unconstrained Testing Environment, revisted (CUTEr)
- Testing environment for optimization and linear algebra solvers. The package contains a collection of test problems, along with Fortran 77, Fortran 90/95 and Matlab tools intended to help developers design, compare and improve new and existing solvers.
- http://cuter.rl.ac.uk/cuter-www/

Opt
- Optimization codes at Netlib.
- http://www.netlib.org/opt/

Projection-Type Methods for Large Quadratic Programs
- Fortran 77 code by Valentia Ruggiero for large and sparse convex quadratic programs.
- http://web.unife.it/utenti/valeria.ruggiero/personale/software/

Minpack
- Fortran 77 code for solving nonlinear equations and nonlinear least squares problems. Five algorithmic paths each include a core subroutine and an easy-to-use driver. The algorithms proceed either from an analytic specification of the Jacobian matrix o
- http://www.netlib.org/minpack/

Modulopt Optimization Routines
- Fortran 77 codes for unconstrained, bound constrained, and nonlinearly constrained optimization.
- http://www-rocq.inria.fr/~gilbert/modulopt/optimization-routines/optimization-routines.html

DONLP2
- Programs by Peter Spellucci for nonlinear programming.
- http://plato.la.asu.edu/donlp2.html

Stanford Business Software
- Sells Fortran 77 optimization codes MINOS (linear programming and nonlinear optimization), SNOPT (large-scale quadratic and nonlinear programming), NPSOL (nonlinear programming), LSSOL (Linearly constrained linear least squares problems and convex quadrat
- http://www.sbsi-sol-optimize.com/

Quadratic Assignment Problem Library (QAPLIB)
- By R.E. Burkard, E. Çela, S.E. Karisch and F. Rendl.
- http://www.seas.upenn.edu/qaplib/codes.html

CirCut
- Fortran 90 package for finding approximate solutions of certain binary quadratic programs, currently including the Max-Cut and the Max-Bisection problems.
- http://www.caam.rice.edu/~zhang/circut/index.html

Lancelot
- Fortran 77 package for solving unconstrained and constrained optimization problems, systems of nonlinear equations, and nonlinear least-squares problems.
- http://www.cse.clrc.ac.uk/nag/lancelot/

Netflow
- Codes for network optimization.
- ftp://dimacs.rutgers.edu/pub/netflow/mincost/solver-1/readme

Network Optimization Codes
- By Dimitri P. Bertsekas.
- http://www.mit.edu:8001/people/dimitrib/noc.htm

Ladislav Luksan Optimization Code
- Fortran 77 codes for nondifferentiable, large-scale, or dense nonlinear optimization.
- http://www.uivt.cas.cz/~luksan/subroutines.html

Fortran Genetic Algorithm
- Initializes a random sample of individuals with different parameters to be optimized using the genetic algorithm approach -- evolution via survival of the fittest. By David Carroll.
- http://cuaerospace.com/carroll/ga.html

Linear Programming
- Ratfor code for the primal-dual log barrier form of the interior point LP solver of Lustig, Marsten and Shanno, ORSA J Opt 1992.
- http://www.econ.uiuc.edu/~roger/research/rqn/rqn.b

TRON
- Trust region Newton method for the solution of large bound-constrained optimization problems, by Chih-Jen Lin and Jorge Moré.
- http://www-unix.mcs.anl.gov/~more/tron/

Optimization Software Developed by J. Nocedal's Research Team
- KNITRO, General Nonlinear Programming Solver; L-BFGS, Limited Memory Codes; PREQN, Preconditioning the Conjugate Gradient Method; and CG+, Conjugate Gradient Software.
- http://www.ece.northwestern.edu/~rwaltz/software.html

Klaus Schittkowski's Optimization Software
- Nonlinear programming codes: SQP, least squares, multicriteria optimization, data fitting in ODEs, DAEs, PDEs, PDAEs.
- http://www.uni-bayreuth.de/departments/math/~kschittkowski/software.htm

Global Optimization
- Links to global optimization code, mainly in Fortran 77 and C, but some links to local minimizers as well.
- http://www.mat.univie.ac.at/~neum/glopt.html

Galahad
- Thread-safe library of Fortran 90 packages for solving nonlinear optimization problems, covering unconstrained and bound-constrained optimization, quadratic programming, nonlinear programming, systems of nonlinear equations and inequalities, and nonlinear
- http://galahad.rl.ac.uk/galahad-www/

Decision Tree for Optimization Software
- Linear and non-linear optimization, constrained and unconstrained. Mainly Fortran 77 but some in C.
- http://plato.la.asu.edu/guide.html

Curvi
- Solves nonlinear optimization problems. [Commercial]
- http://www.maxthis.com/curvi.htm

Computational Optimization and Applications
- Codes from journal, in Fortran, Matlab, C, and C++.
- http://www.ici.ro/camo/hco.htm