Decision Tree for Optimization Software - Linear and non-linear optimization, constrained and unconstrained. Mainly Fortran 77 but some in C. 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 least squares problems. Global Optimization - Links to global optimization code, mainly in Fortran 77 and C, but some links to local minimizers as well. 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. TRON - Trust region Newton method for the solution of large bound-constrained optimization problems, by Chih-Jen Lin and Jorge Moré. 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. CirCut - Fortran 90 package for finding approximate solutions of certain binary quadratic programs, currently including the Max-Cut and the Max-Bisection problems. 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 quadratic programming), and QPOPT (linear and quadratic programming). 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 or directly from the problem functions. Opt - Optimization codes at Netlib. Constrained and Unconstrained Testing Environment, revisted (CUTEr) - Testing environment for optimization and linear algebra solvers. The package includes 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. Differential Evolution - Fortran 90 code implementing the Differential Evolution method, a simple but powerful population-based, stochastic function minimizer. SUBPLEX - Subspace-searching simplex method for the unconstrained optimization of general multivariate functions, generalizing the Nelder-Mead simplex method. DONLP2 - Fortran 77 code for general differentiable nonlinear programming using dense linear algebra, by Peter Spellucci. TANGO: Trustable Algorithms for Nonlinear General Optimization - A set of Fortran routines for optimization developed at the University of São Paulo. Includes downloads, test problems, and related publications. Fortran 95 Codes for Convex Network Optimization - Modules for random number generation, plotting, sorting, ranking, combinatorics, network optimization, and optimization. Written in FWEB by Aleksandar Donev. Quadratic Assignment Problem Library (QAPLIB) - By R.E. Burkard, E. Çela, S.E. Karisch and F. Rendl.