MathPro Inc.
Specializes in the practical application of mathematical programming to economic analysis, planning, public policy, and decision support.

Palisade Corporation
Risk and decision analysis software, including @RISK.

LINDO Systems
Optimization modelling software.

Strategic Decisions Group
An international management consulting firm specializing in strategy, strategic change, and growing shareholder value.

Lumina Decision Systems, Inc.
Business modelling consulting, software, and seminars.

GAMS Development Corporation
The General Algebraic Modeling System (GAMS) is a high-level modeling system for mathematical programming problems.

Expert Choice Inc.
AHP and other decision support software.

Banxia: Software for Data Envelopment Analysis and qualitative modeling
Developer of Frontier Analyst, and Decision Explorer software for professional decision making.

Visual Thinking International
Developers of VISA, a sensitivity analysis tool and SIMUL8, which is used for discrete event simulation.

TreeAge Software, Inc.
Decision tree analysis software.

Drayton Analytics
Provider of software and economic consulting services to the Operations Research community and utility industries

Monte Carlo Simulation, Forecasting, and Optimization
Analycorp presents INSIGHT.xla, software for Monte Carlo simulation, forecasting, and optimization, as well as seminars in their application.

AMPL Modeling Language for Mathematical Programming
Support for users and prospective users of AMPL, a language and computing environment for describing a broad variety of optimization problems to a range of "solvers" for such problems.

pysimplex
Mixed integer/linear programming modules.

Decision Analysis Training & Consulting
Training and assistance in Decision Analysis and Project Risk Management; software; consulting.

Strategic Management Science Inc.
Helping management use MS/OR to create a sustainable competitive advantage. They also publish a monthly e-newsletter.

Dose
Two new software products solving optimal inventory control problems for trade and tech service enterprises.

ILOG - Optimization Software Vendor
Information about the ILOG Optimization Suite, ILOG CPLEX, ILOG Solver, and ILOG OPL Studio

DecisionTek, LLC
Designs and implements custom studies and technology solutions.

Mathcom Solutions, Inc.
Software solutions for finance, engineering, and operations.

AIMMS - The Modeling System of Paragon Decision Technology
An advanced integrated multidimensional modeling software for building decision support and optimization applications.

ORTEC - Planning, Optimization and Decision Support Solutions
ORTEC is a major player in the advanced planning software and operations research field.

OPCOM Pty Limited
Scheduling and rostering, network optimisation and journey planning. Software and consultancy services.

Veros Software
Veros Software is a predictive technology software company.

Specialist Software Engineering Consultancy
Tynemarch Systems Engineering Ltd. specialises in the field of applied systems analysis and optimisation.

Dash Optimization
Modelling and optimisation software, Xpress-MP solves large optimization problems in areas such as supply chain & logistics.

Decisioneering, Inc.
Producer of Excel-based risk and decision analysis tools (Crystal Ball, CB Predictor) for business forecasting

Polaris Consulting
Provides professional consultancy services in Operational Research (OR).

Casariego's Formula
Calculation of the economical magnitudes, and the optimal relationship between the magnitudes of a standard industrial series (Spanish/English).

QUADRANT: Risk Analysis Tool for Excel
Monte-Carlo Risk Analysis add-in for Excel. Free trial download.

DEAzone
Data Envelopment Analysis Software.

Extralogix Solutions
Provides customized optimization software solutions and consultancy services in OR.

AGR
A software house and engineering company specialising in solutions and consultancy services.

Dash Optimization (UK)
Xpress-MP solves large optimization problems in areas such as supply chain & logistics.

PSL Optimisation Software
Provides optimisation software development.

Axioma, Inc.
Provides modeling and optimization technology to help in decision support applications. Includes news releases and contact information.

HIRON: Global Optimization Algorithm
Web-based tool for solving practical optimization problems.

OptiRisk Systems
Creator of fortmp, fortsp, fortQP, and ampl software.

Basic Simulation Concepts
A brief description of dynamic simulation with a focus on probabilistic analysis of uncertain systems.

ConSolve
A platform-independent software component for solving optimization problems.

NexSim Consulting, Llc
Provides discrete event simulation, robotics, emulation and virtual factory applications.

Decision Science Center - For Optimal Business Decisions
Decision Science Center partners with companies to consult in the areas of optimal business decisions across industries.

LEGION
The Legion simulation system predicts, measures and displays actual human movement within existing and unbuilt venues, to improve design and operational effectiveness and safety.

Critical Path Analysis and PERT charts
A short overview of project analysis/management networks describing Critical Paths and PERTs

Novel technology for numerical optimization
New technology for large-dimensional non-linear optimization is presented. Free version of software for optimization is available.

ILOG CPLEX
Delivers optimization software for solving linear, MIP and MIQP problems.

Optomatica consulting
A consultancy with expertise in optimization, machine learning, neural networks, natural computation approaches, and advanced modeling techniques.

OPTLINE - Integer and Combinatorial Optimization
OptLine is a combinatorial optimization problems solver.

Maximum Entropy Data Consultants Ltd (MEDC)
MEDC specializes in custom and semi-custom software for Bayesian Data Analysis to estimate the parameters of a physical distribution given some data.

CQM - Specialists in Quantitative Modelling
Consulting service and software design.

Point Wizard
A web based system for decision analysis and for calibrating additive points systems. It is based on the PRO-AM method to help decision makers prioritise and choose among alternatives.

TOMLAB - MATLAB Optimization
For fast and robust large-scale optimization in MATLAB. TOMLAB provides interfaces to CPLEX, Xpress, SNOPT, MINOS, and MINLP.

The KNITRO solver
KNITRO solves continuous nonlinear optimization problems by implementing an interior (barrier) type method with trust regions.

AMO's solutions
A dutch consultancy specialising in scientific computing and general data-based modelling.

INFORM UK
INFORM supplies IT systems for intelligent decision support based on advanced optimization technologies including fuzzy logic.

Nonlinear optimization algorithms and software
Pinter Consulting Services specializes in algorithm and software development, consulting and workshops.

Park Place Deicision Sciences
Offers a full range of evaluation, analysis, modeling and implementation services to business and public agencies.

Intelligent Decision System
Specialised in multi-criteria decision analysis under uncertainties.

Decision Context - Prudent decision making
Operations Research Enthusiasts - Practising Optimization, Simulation, Statistics and building models in Excel and Access

Johnothan Rears
Operations Research Analyst and Management Scientist Consultant using methods of operations research and applied mathematics.

COmputational INfrastructure for Operations Research
Open-source software for the OR community.

Cpatte, Senior Software/Solution Architect
Supply Chain Management, OR, Modeling and ILOG technology.