Adept Scientific  
   Offers a broad range of personal computer products for mathematical, scientific and engineering applications.
   http://www.adeptscience.com/

Aepryus Software  
   Mathematics, Physics and Evolutionary Biology.
   http://Aepryus.com/

Aptech Systems, Inc.  
   Produce a data analysis environment based on the GAUSS Matrix Programming Language and other data analysis tools.
   http://www.aptech.com/

Bandaar  
   Suppliers of VBMatrix, a scientific/mathematical software language using Visual Basic syntax. MATLAB and C++ compatible elements to produce EXEs and DLLs. Student and demonstration versions free download.
   http://www.bandaar.com/

CANdiensten  
   Commercial offshoot of CAN (Computer Algebra Nederland) specialising in software, courses and consultancy in mathematics and statistics.
   http://www.candiensten.nl/english/

Chartwell-Yorke  
   Computer algebra mathematics software (Derive 5 and LiveMath), Autograph for plotting, coordinate geometry and single variable statistics, Cabri-Geometre II dynamic geometry software, Fathom dynamic statistics, MathType equation editor.
   http://www.chartwellyorke.com/

Clecom  
   Suppliers of symbolic, statistical and DSP software.
   http://www.clecom.co.uk/

Codemist Ltd  
   Software provider in compilers and symbolic computation. The main products are the Norcroft C compiler and the computer algebra system Reduce, together with the Lisp system CSL/CCL. Demo versions available free for download.
   http://www.codemist.co.uk/

CompuKalc  
   Software consultancy offering component based Numerical and Financial software for Unix and Windows.
   http://homepage.ntlworld.com/mg.levy

MathConsult GmbH  
   Software company developing customized numerical software for engineering and finance.
   http://www.mathconsult.co.at/

MathPad Software Corp.  
   Online mathematical tools including curve plotting and fitting, with applications in thermodynamics and chemistry.
   http://www.mathpad.com/

MathResources, Inc.  
   Makers of MathResource, the interactive version of The HarperCollins Dictionary of Mathematics by Borowski & Borwein, MathPoints, and MRI Graphing Calculator.
   http://www.mathresources.com/

Maximal Software  
   Developers of the MPL Modeling System and OptiMax 2000 Component Library for building mathematical optimization models. Free student versions of MPL/CPLEX available for download.
   http://www.maximal-usa.com/

Numerical Algorithms Group (NAG)  
   Math, statistical and 3D visualization software components for finance, energy, life sciences, research and engineering.
   http://www.nag.com

Perfectly Scientific, Inc.  
   Scientific algorithm company. Expertise in compression, wavelets, FFT, general transforms, color graphics, Monte Carlo, fractals, convolution,signal processing, matrix algebra, genetic algorithms, number theory.
   http://www.perfsci.com/

Visual Numerics  
   Data Analysis, Mathematics, Visualization: software that helps people understand data. Products include the IMSL Libraries, PV-WAVE and JWAVE.
   http://www.vni.com/

Steven M. Christensen and Associates, Inc.  
   Scientific and mathematical software and consulting services, commercial and free. Expertise in Mathematica, MathTensor, Schur.
   http://smc.vnet.net/Christensen.html

Poly Software International  
   PSI-Plot and ProStat statistical and graphics software for purchase.
   http://www.polysoftware.com/

Stochastica  
   Conducts scientific research, develops innovative technologies of data analysis and modeling, numeric algorithms and corresponding software implementation.
   http://stochastica.org/

Research Systems, Inc.  
   A Kodak company specializing in scientific data visualization and analysis software such as IDL, ENVI, Noesys, ION, VIP and RiverTools.
   http://www.rsinc.com/

Advanced Visual Systems  
   Data visualization, perceptual computing, complex data analysis, technical and engineering problem-solving. Includes list of products and information about the company.
   http://www.avs.com/index.html

Systat Software Inc.  
   Offers programs for interpreting statistical data, curve fitting and signal analysis. Includes support links and product information.
   http://www.systat.com/

Heuchera Technologies  
   Linear algebra library and random number generator programs. Includes contact information.
   http://www.OptimaNumerics.com/

CenterSpace Software  
   .NET numerical analysis. NMath products contain C# interfaces to BLAS and LAPACK, random number generators, anova, regression, probability distributions, sparse matrices, hypothesis tests and descriptive statistics. Evaluation versions available.
   http://www.centerspace.net

Lyryx Learning Inc.  
   Specializes in the design and development of tools to deliver online educational content and assessment. Also offers own online courses in business mathematics, financial accounting, and linear algebra.
   http://lyryx.com

Rogue Wave Software  
   Provider of a wide-range of components for the cross-platform C++ market including mathematical, financial and statistical class libraries.
   http://www.roguewave.com

Optomatica  
   A consulting company offerring agent-based modeling and optimization services.
   http://www.optomatica.com

Hermetic Systems  
   Mathematical software dealing with prime numbers and factorization.
   http://www.hermetic.ch/misc.htm

S&S Software  
   S&S Software publishes the original Math Skill Builders series of programs for children and adults learning basic arithmetic skills. Visit the site for free worksheets and to preview software.
   http://www.sssoftware.com/

CleverSet, Inc.  
   Develops and exploits proprietary Relational Bayesian Modeling (RBM) technology and applications that provide real-time, actionable results from large amounts of dynamic, multi-faceted, ambiguous information.
   http://www.cleverset.com

Quasinewtonian Technologies  
   QNT is a Canadian sotfware company with a special interest in mathematically and numerically intensive applications.
   http://www.quasinewtonian.com/

Ziena Optimization Inc.  
   Nonlinear (NLP) solver with interfaces to most modeling languages. Consulting for problem formulation and training are also available.
   http://ziena.com/

Numerical Algorithms Group (NAG) Ltd.  
   Develops and provides software to solve complex mathematical problems. Free bimonthly electronic newsletter.
   http://www.nag.co.uk/

Optimal Designs Enterprise  
   Calculus based products for engineering, featuring "Automatic Differentiation". Based in Walnut Creek, CA, USA.
   http://www.digitalCalculus.com/

Phaser  
   A universal simulator for dynamical systems.
   http://www.phaser.com

AMO's solutions  
   A mathematical consultancy specializing in scientific computing, time series analysis, neural networks, data analysis, optimization and MATLAB.
   http://members.home.nl/amo/English/

Aspire Software International  
   Offers SigmaPlot, technical graphing software; SigmaStat, statistical analysis; SigmaScan, image processing for measuring scientific images; and SPSS for decision making using powerful statistical software. For sale only in North and Central America.
   http://www.aspiresoftwareintl.com/

The MathWizards, Inc.  
   Produces software for digital signal processing (DSP), data analysis, visualization, and application development. Includes products and ordering information.
   http://www.mathwizards.com

Extreme Optimization  
   Numerical components for C# and Visual Basic .NET: Linear algebra (BLAS and LAPACK), numerical integration, solving equations, complex numbers, statistics and more.
   http://www.extremeoptimization.com/

Easy Math Solution  
   Software development company specialising in developing algorithm and component-based software based in Toronto, Canada.
   http://www.e-MathSolution.com

Innovative Numerical Technologies (inuTech)  
   Develops and markets the C++ framework Diffpack (numerical solution of PDEs).
   http://www.inutech.de/english/

Palam Software, Inc.  
   Developer of ZigZag graphing software for Windows. ZigZag can plot Cartesian (Y(x) and X(y)), polar, parametric and table-defined graphs. Fully customizable graphs and coordinate plane axes.
   http://palamsoft.com