uCalc

uCalc Fast Math Parser is used by Fortune 500 companies from categories such as Aeronautics, Automobile, Banking, Computers, and Securities. This scientific calculator is the ideal companion for high school/college math. Anyone else can use it for everyday calculations as well. Check out the interactive animated tutorial. A cartoon character will walk you through uCalc’s many features. (Source: http://mathres.kevius.com/software.htm)