Mathematical calculations using scripts and commands in a console-based multiple-window interface using the Microsoft VBScript engine. Windows; shareware.
http://www.flashpeak.com/scriptcon
Scientific and engineering calculator for Windows.
http://www.chat.ru/~pmikh/
Calculator that performs the basic arithmetic operations on fractions and then at the press of a button gives you a detailed explanation of how the computation was done.
http://www.bacsoftware.co.uk/fcalc1/
General linear and nonlinear statistical regression analysis.
http://www.nlreg.com/
Online financial calculator that determines NPV, IRR, MIRR, PV, FV and amortization schedules.
http://i98davsc.island.liu.se/
Guide to online calculators, including those designed for home, travel, finance, health, and small business.
http://www.ifigure.com/
Combined archive and directory of mathematics web sites, mailing lists, and teaching materials. At University of Tennessee.
http://archives.math.utk.edu/
Online calculators for several calculus functions.
http://math.vanderbilt.edu/~pscrooke/toolkit.shtml