Wolfram.com - Mathematica
- Symbolic, graphics, language and numerical software. Page includes explanation and visual snapshots of program.
- http://www.wolfram.com/

MathTensor, Inc.
- Developers and distributors of MathTensor, a Mathematica-based package for performing tensor analysis by computer. Formerly MathSolutions, Inc.
- http://smc.vnet.net/mathtensor.html

Scientific Arts
- Consulting with Mathematica: Scientific Arts is a consulting and creative services company which provides targeted solutions for a broad range of scientific enterprises.
- http://www.scientificarts.com/

HostSRV
- A web hosting company dedicated to providing MathScript capabilities to websites.
- http://www.hostsrv.com/

Analytica
- Analytica provides consulting and training to the Mathematica community.
- http://analytica.com.au/

MathC
- MathC provides statistical consulting using Mathematica, visualization of mathematical concepts in the area of teaching Mathematics, and Mathematica-applied college-level mathematics.
- http://www.mathematica.co.kr/