Fermat

Fermat is a computer algebra system designed for use on a variety of platforms including Macintosh, Windows, Linux, and Unix. The system was developed by Robert H. Lewis, a professor of mathematics at Fordham University.

Fermat is an impressive software package that is capable of performing a wide range of mathematical calculations including arithmetic with arbitrarily long integers and fractions, symbolic calculations, matrices over polynomial rings, graphics, and various numerical calculations.

One of the most impressive features of Fermat is its speed. Unlike other math software programs, Fermat performs calculations at an incredibly fast pace. Additionally, Fermat is highly economical in terms of space requirements, so users won't have to worry about running out of storage while working on complex calculations.

The primary version of Fermat is geared towards polynomial and matrix algebra over the rationals Q and finite fields. However, for Mac users, Fermat also offers a version for OS X, as well as versions for OS 9. In addition, there is a "float" version available for graphics.

Overall, Fermat is an excellent choice for anyone needing a reliable, fast, and powerful computer algebra system.