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

LINDO Systems - Optimization modelling software.

Strategic Decisions Group - An international management consulting firm.

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 - Banxia develop software for professional decision making. Frontier Analyst provides Data Envelopment Analysis to measure an organisation's efficiency. Decision Explorer lets you create maps to model a situation and develop a strategy.

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

BR solutions - BR solutions main strength lies in creating and testing mathematical models as well as implementing user-friendly software around them so they can be used on a day-to-day basis.

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.

Compass Modeling Solutions - Now acquired by ILOG. Software and consulting for optimization-based decision-support.

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.

Operations Management Resources - A comprehensive list of resources for fields related to Operations Management, including a discussion area, job postings, an online store, and links.

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

helping management to achieve a competitive advantage through Management Science/Operations Research - Strategic Management Science Inc. offers consulting services to help management use MS/OR to create a sustainable competitive advantage. They also publish a monthly e-newsletter that reports on developments in the strategic use of MS/OR.

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 - DecisionTek 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 International - ORTEC provides its clients with optimization software and consulting services.

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 focusing on improving profits for its customers. Veros has incorporated its predictive technologies in a line of software products known as VeroSuite. Veros software is designed to allow companies to make faster, more accurate, more consistent, and more informed business decisions.

CapitalBudgeting.Com - Software and resources for economic decision making and financial risk analysis

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

Dash Optimization- Home of Xpress-MP optimization software - Modelling and optimisation software. Xpress-MP solves large optimization problems, enabling better business decisions with financial benefits 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

SES/workbench - HyPerformix, formerly SES, is the company that develops, markets and sells the SES/workbench product for systems design engineering environments.

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.

Monotone System - Marginal Dissimilarity - Collection of manuscripts devoted to Monotone Systems Theory marginal dissimilarity view