Below is a partial list of organizations that produce software of use to the mathematical community.

• Apple Computer
• AT&T Labs – Research
• Civilized Software Inc. (MLAB)
• Edmentum (formerly Academic Systems / Plato Learning.  Interactive mathematics software for college & high school)
• MathType by Wiris
• Maplesoft: Math Software (Maple)
• Mathcad (at PTC)
• MathWorks (Matlab, Simulink)
• Microsoft
• Modelica Association (Modeling of complex physical systems)
• Netlib (Repository at UTK and ORNL)
• Pedagoguery Software Inc. (GrafEq, Poly)
• Poliplus Software (Smart Reader eBook)
• Red Hat Linux
• SAS Institute Inc. (SAS statistical products)
• Scicos (Block diagram modeler/simulator)
• Scilab Consortium (Open source platform for numerical computation)
• Theorist Interactive, LLC (LIVEMATH, MathEq)
• Wolfram Research Inc. (Mathematica, Mathematical Explorer)