mathnium

Mathnium is a program for interactive numerical computations. With its comprehensive library of functions for a variety of problems in applied mathematics, and with its facilities for the definition and manipulation of arrays of numbers as basic data objects, Mathnium allows you to solve numerical problems rather painlessly and without a great deal of programming effort. Mathnium may also be used as a programming language to implement numerical algorithms in a concise manner which usually is very close to the mathematical description of the algorithms. (Source: http://freecode.com/)