Math

WolframAlpha - a knowledge and computation app that uses a vast collection of algorithms and data to compute answers and generate reports on topics related to math, statistics & data analysis, physics, chemistry, engineering, astronomy, earth science, life sciences, weather, and more.

Sketchpad Explorer - drag, manipulate and animate visual mathematics to develop and generalize your understanding of fundamental concepts across elementary math, geometry, algebra, trigonometry, calculus and beyond.