Mathematica: Wolfram Demonstrations Project - Video
Conceived by Mathematica creator and scientist Stephen Wolfram as a way to bring computational exploration to the widest possible audience, The Wolfram Demonstrations Project is an open-code resource that uses dynamic computation to illuminate concepts in science, technology, mathematics, art, finance, and a remarkable range of other fields.
Source: Wolfram Research.
Mathematica is a computational software program used in scientific, engineering, and mathematical fields and other areas of technical computing. It was originally conceived by Stephen Wolfram and developed by a team of mathematicians and programmers that he assembled and led.
It is developed by Wolfram Research of Champaign, Illinois.