ABACUS - A Branch-And-CUt System - ABACUS is a software system which provides a framework for the implementation of branch-and-bound algorithms using linear programming relaxations that can be complemented with the dynamic generation of cutting planes or columns (branch-and-cut, branch-and-price,branch-and-cut-and-price).

LINDO Optimization Modeling Tools - Software for linear, integer and nonlinear optimization. LINDO supplies large scale solvers with links to Excel and database applications.

GOSSET - A general-purpose program for experimental designs.

Dash Optimization: for Linear, Integer and Quadratic Programming and Optimization Modeling - Dash Optimization: for Linear, Integer and Quadratic Programming and Optimization Modeling

Simplex Method Tool - Web-based application to solve linear programming problems using the simplex method.

Linear and Nonlinear Programming FAQ - Includes basic definitions and links to free and commercial software.

Global (and Local) Optimization - An archive of online information on global optimization.

Using n2fb.f and n2gb.f in C environment - Modular program for solving nonlinear least-square parameter estimation problems. Provides instructions how to port two important optimization Fortran codes to C.